tolerance box relative to the bulb base centerline.
    3. Transverse location of the filament centerline or the
filament tolerance box relative to the bulb base centerline.
    4. Filament tolerance box dimensions, if used.
    C. If the replaceable light source has both a lower beam and an
upper beam filament, the dimensional relationship between the two
filament centerlines or the filament tolerance boxes may be provided
instead of referencing the upper beam filament centerline or
filament tolerance box to the bulb base centerline or reference
plane.
    D. For a light source using excited gas mixtures as a filament,
necessary fiducial information and specifications including
electrode position dimensions and tolerance information that provide
similar location and characteristics information required by
paragraphs A, B, and C of this section I for light sources using a
resistive type filament.

II. Dimensions Pertaining to Filament Capsule and Capsule Supports

    A. Maximum length from bulb base reference plane to tip of
filament capsule.
    B. Maximum radial distances from bulb base centerline to
periphery of filament capsule and/or supports.
    C. Location of black cap relative to low beam filament
centerline, filament tolerance box or other to-be-specified
reference.
    D. Size, length, shape, or other pertinent features and
dimensions for providing undistorted walls for the filament capsule.

III. Bulb Base Interchangeability Dimensions and Tolerance

    A. Angular locations, diameters, key/keyway sizes, and any other
interchangeability dimensions for indexing the bulb base in the bulb
holder.
    B. Diameter, width, depth, and surface finish of seal groove,
surface, or other pertinent sealing features.
    C. Diameter of the bulb base at the interface of the base and
its perpendicular reference surface.
    D. Dimensions of features related to retention of the bulb base
in the bulb holder such as tabs, keys, keyways, surfaces, etc.

IV. Bulb Holder Interchangeability Dimensions and Tolerance

    A. Mating angular locations, diameters, key/keyway sizes, and
any other interchangeability dimensions for indexing the bulb base
in the bulb holder.
    B. Mating diameter, width, depth, and surface finish of seal
groove, surface, or other pertinent sealing features.
    C. Mating diameter of the bulb holder at the interface of the
bulb base aperture and its perpendicular reference surface.
    D. Mating dimensions of features related to retention of the
bulb base in the bulb holder such as tabs, keys, keyways, surfaces,
etc.

V. Wiring Harness Connector to Bulb Base Interchangeability
Dimensions and Tolerances

    A. Maximum depth of harness connector insertion into bulb base.
    B. Location of electrical pins in bulb base.
    C. Dimensions of electrical pins in bulb base--length, diameter,
width, thickness and etc.
    D. Fit of harness connector into bulb base providing all
necessary dimensions, key/keyway controls, and dimensions, tapers
etc.
    E. Dimensions and location of locking features for wiring
harness connector to bulb base.
    F. Identification of upper beam, lower beam, and common
terminals.

VI. Seal Specifications (if Replaceable Light Source is Intended to
be of a Sealed Base Design)

    A. Type.
    B. Material.
    C. Dimensions.

VII. Electrical Specifications for Each Filament at 12.8 Volts

    A. Maximum power (in watts).
    B. Luminous Flux with tolerance (in lumens) with black cap if so
equipped, measured in accordance with the document: Illuminating
Engineering Society of North America, LM-45; IES Approved Method for
Electrical and Photometric Measurements of General Service
Incandescent Filament Lamps (April 1980). This incorporation by
reference was approved by the Director of the Federal Register in
accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be
obtained from the Illuminating Engineering Society of North America,
345 East 47th St., New York, NY 10017. Copies may be inspected at
the National Highway Traffic Safety Administration, Technical
Information Services, 1200 New Jersey Avenue, Washington, DC 20590,
or at the National Archives and Records Administration (NARA). For
information on the availability of this material at NARA, call 202-
741-6030, or go to: http://www.archives.gov/federal_ register/

code--of-- federal regulations/ibr--locations.html.

VIII. Bulb Markings/Designation--ANSI NUMBER, ECE IDENTIFIER,
MANUFACTURER'S PART NUMBER, INDIVIDUALLY OR IN ANY COMBINATION

IX. All Other Information, Dimensions or Performance Specifications
Necessary for Interchangeability, Replaceability, or System Test
Purposes not Listed in Sections I Through VIII

    IF A BALLAST IS REQUIRED FOR OPERATION, A COMPLETE LISTING OF
THE REQUIREMENTS AND PARAMETERS BETWEEN THE LIGHT SOURCE AND
BALLAST, AND BALLAST AND THE VEHICLE SHALL ALSO BE PROVIDED.

Appendix B to Part 564--Information to be Submitted for Long Life
Replaceable Light Sources of Limited Definition

I. Filament or Discharge Arc Position Dimensions and Tolerances
Using Either Direct Filament or Discharge Arc Dimensions or the
Three Dimensional Filament Discharge Arc Tolerance Box

    A. Lower beam filament or discharge arc dimensions or filament
or discharge arc tolerance box dimensions and relation of these to
the bulb base reference plane and centerline.
    1. Axial location of the filament or discharge arc centerline or
the filament or discharge arc tolerance box relative to the bulb
base reference plane.
    2. Vertical location of the filament or discharge arc centerline
or the filament or discharge arc tolerance box relative to the bulb
base centerline.
    3. Transverse location of the filament or discharge arc
centerline or the filament or discharge arc tolerance box relative
to the bulb base centerline.
    4. Filament or discharge arc tolerance box dimensions, if used.
    B. Upper beam filament or discharge arc dimensions or the
filament or discharge arc tolerance box dimensions and relation of
these to the bulb base reference plane and centerline.
    1. Axial location of the filament or discharge arc centerline or
the filament or discharge arc tolerance box relative to the bulb
base reference plane.
    2. Vertical location of the filament or discharge arc centerline
or the filament or discharge arc tolerance box relative to the bulb
base centerline.
    3. Transverse location of the filament or discharge arc
centerline or the filament or discharge arc tolerance box relative
to the bulb base centerline.
    4. Filament or discharge arc tolerance box dimensions, if used.
    C. If the replaceable light source has both a lower beam and
upper beam filament or discharge arc, the dimensional relationship
between the two filament or discharge arc centerlines or the
filament or discharge arc tolerance boxes may be provided instead of
referencing the upper beam filament or discharge arc centerline or
filament or discharge arc tolerance box to the bulb base centerline
or reference plane.
    D. For a light source using excited gas mixtures as a filament,
necessary fiducial information and specifications including
electrode position dimensions, and tolerance information that
provide similar location and characteristics information required by
paragraphs A, B, and C of this section I for light sources using a
resistive type filament.

II. Bulb Base Interchangeability Dimensions and Tolerance

    A. Angular locations, diameters, key/keyway sizes, and any other
interchangeability dimensions for indexing the bulb base in the bulb
holder.
    B. Diameter, width, depth, and surface finish of seal groove,
surface, or other pertinent sealing features.
    C. Diameter of the bulb base at the interface of the base and
its perpendicular reference surface.
    D. Dimensions of features related to retention of the bulb base
in the bulb holder such as tabs, keys, keyways, surface, etc.

III. Bulb Holder Interchangeability Dimensions and Tolerances

    A. Mating angular locations, diameters, key/keyway sizes, any
other interchangeability dimensions for indexing the bulb base in
the bulb holder.
    B. Mating diameter, width, depth, and surface, or other
pertinent sealing features.
    C. Mating diameter of the bulb holder at the interface of the
bulb base aperture and its perpendicular reference surface.
    D. Mating dimensions of features related to retention of the
bulb base in the bulb holder such as tabs, keys, keyways, surface,
or any other characteristics necessary for mating dimensions.

IV. Electrical Specifications for Each Light Source That Operates
With a Ballast and Rated Life of the Light Source/Ballast
Combination

    A. Maximum power (in watts).
    B. Luminous Flux (in lumens).
    C. Rated laboratory life of the light source/ballast combination
(not less than 2,000 hours).

V. Applicable to Light Sources That Operate With a Source Voltage
Other Than 12.8 Volts Direct Current, and When a Proprietary
Ballast Must Be Used With the Light Source

    A. Manufacturer's part number for the ballast.
    B. Any other characteristics necessary for system operation.

VI. Bulb Markings/Designation--ANSI NUMBER, ECE IDENTIFIER,
MANUFACTURER'S PART NUMBER, INDIVIDUAL OR IN ANY COMBINATION

VII. All Other Identification, Dimensions or Performance
Specifications Necessary for Replaceability or Systems Test Not
Listed in Sections I Through VI

Appendix C to Part 564--Information Applicable to Standardized Sealed
Beam Headlamp Units

I. Dimensional Information Specific to a Type of Standardized
Sealed Beam Unit.

    A. Dimensions marked ``I'', indicating interchangeability, for
which conformance is mandatory.
    B. All other dimensions which are for design purposes.

II. Dimensional Information Applicable to the Use of Nonadjustable
Headlamp Aiming Device Locating Plates

III. Dimensional Information Applicable to Mounting Features,
Including Mounting Rings and Lamp Bodies, Specific to a Type of
Standardized Sealed Beam Unit

    A. Dimensions marked ``I'', indicating interchangeability, for
which conformance is mandatory.
    B. All other dimensions which are for design purposes.

Incorporated Figures [References from 49 CFR 571.108, Oct. 1, 2006]

LF Headlamp Dimensional Information [Figure 11]
UF Headlamp Dimensional Information [Figure 12]
LF/UF Mounting Features [Figure 13]
LF/UF Mounting Ring [Figure 14]
Type G & H Headlamp Dimensional Information [Figure 18]
Type G & H Headlamp Mounting Information [Figure 21]
Type 1A1 Headlamp Dimensional Information [SAE J1383 APR85, Figure
11]
Type 2A1 Headlamp Dimensional Information [SAE J1383 APR85, Figure
10]
Type 2B1 Headlamp Dimensional Information [SAE J1383 APR85, Figure
13]
Type 1C1 Headlamp Dimensional Information [SAE J1383 APR85, Figure
7]
Type 2C1 Headlamp Dimensional Information [SAE J1383 APR85, Figure
8]
Type 2D1 Headlamp Dimensional Information [SAE J1383 APR85, Figure
5]
Type 2E1 Headlamp Dimensional Information [SAE J1383 APR85, Figure
15]
Types 1A1, 2A1, and 2E1 Headlamp Mounting Ring/Lamp Body Dimensional
Information [SAE J1383 APR85, Figure 12]
Type 2B1 Headlamp Mounting Ring/Lamp Body Dimensional Information
[SAE J1383 APR85, Figure 14]
Types 1C1and 2C1 Headlamp Mounting Ring/Lamp Body Dimensional
Information [SAE J1383 APR85, Figure 9]
Type 2D1 Headlamp Mounting Ring/Lamp Body Dimensional Information
[SAE J1383 APR85, Figure 6]

PART 571--FEDERAL MOTOR VEHICLE SAFETY STANDARDS

0
2. The authority citation for Part 571 continues to read as follows:

    Authority: 49 U.S.C. 322, 30111, 30115, 30117, 30166; delegation
of authority at 49 CFR 1.50.

0
3. Section 571.108 is amended to read as follows:

Sec.  571.108  Standard No. 108; Lamps, reflective devices, and
associated equipment.

    S1 Scope. This standard specifies requirements for original and
replacement lamps, reflective devices, and associated equipment.
    S2 Purpose. The purpose of this standard is to reduce traffic
accidents and deaths and injuries resulting from traffic accidents, by
providing adequate illumination of the roadway, and by enhancing the
conspicuity of motor vehicles on the public roads so that their
presence is perceived and their signals understood, both in daylight
and in darkness or other conditions of reduced visibility.
    S3 Application. This standard applies to:
    S3.1 Passenger cars, multipurpose passenger vehicles, trucks,
buses, trailers (except pole trailers and trailer converter dollies),
and motorcycles;
    S3.2 Retroreflective sheeting and reflex reflectors manufactured to
conform to S8.2 of this standard; and
    S3.3 Lamps, reflective devices, and associated equipment for
replacement of like equipment on vehicles to which this standard
applies.
    S4 Definitions.
    Aiming plane means a plane defined by the surface of the three
aiming pads on the lens.
    Aiming reference plane means a plane which is perpendicular to the
longitudinal axis of the vehicle and tangent to the forwardmost aiming
pad on the headlamp.
    Aiming screws are the horizontal and vertical adjusting screws with
self-locking features used to aim and retain a headlamp unit in the
proper position.
    Axis of reference means the characteristic axis of the lamp for use
as the direction of reference (H = 0[deg], V = 0[deg]) for angles of
field for photometric measurements and for installing the lamp on the
vehicle.
    Backup lamp means a lamp or lamps which illuminate the road to the
rear of a vehicle and provide a warning signal to pedestrians and other
drivers when the vehicle is backing up or is about to back up.
    Beam contributor means an indivisible optical assembly including a
lens, reflector, and light source, that is part of an integral beam
headlighting system and contributes only a portion of a headlamp beam.
    Cargo lamp is a lamp that is mounted on a multipurpose passenger
vehicle, truck, or bus for the purpose of providing illumination to
load or unload cargo.
    Clearance lamps are lamps which show to the front or rear of the
vehicle, mounted on the permanent structure of the vehicle as near as
practicable to the upper left and right extreme edges to indicate the
overall width and height of the vehicle.
    Coated materials means a material which has a coating applied to
the surface of the finished sample to impart some protective
properties. Coating identification means a mark of the manufacturer's
name, formulation designation number, and recommendations for
application.
    Color Fundamental definitions of color are expressed by
Chromaticity Coordinates according to the International Commission on
Illumination (C.I.E.) 1931 Standard Colorimetric System, as described
in the CIE 1931 Chromaticity Diagram (incorporated by reference, see
571.108 S5.2 of this title).
    Color bleeding means the migration of color out of a plastic part
onto the surrounding surface.
    Combination clearance and side marker lamps are single lamps which
simultaneously fulfill the requirements of clearance and side marker
lamps.
    Cracking means a separation of adjacent sections of a plastic
material with penetration into the specimen.
    Crazing means a network of apparent fine cracks on or beneath the
surface of materials.
    Cutoff means a generally horizontal, visual/optical aiming cue in
the lower beam that marks a separation between areas of higher and
lower luminance.
    Daytime running lamps (DRLs) are steady burning lamps that are used
to improve the conspicuity of a vehicle from the front and front sides
when the regular headlamps are not required for driving.
    Delamination means a separation of the layers of a material
including coatings.
    Design voltage means the voltage used for design purposes.
    Direct reading indicator means a device that is mounted in its
entirety on a headlamp or headlamp aiming or headlamp mounting
equipment, is part of a VHAD, and provides information about headlamp
aim in an analog or digital format.
    Effective light-emitting surface means that portion of a lamp that
directs light to the photometric test pattern, and does not include
transparent lenses, mounting hole bosses, reflex reflector area, beads
or rims that may glow or produce small areas of increased intensity as
a result of uncontrolled light from an area of \1/2\[deg] radius around
a test point.
    Effective projected luminous lens area means the area of the
orthogonal projection of the effective light-emitting surface of a lamp
on a plane perpendicular to a defined direction relative to the axis of
reference. Unless otherwise specified, the direction is coincident with
the axis of reference.
    Exposed means material used in lenses or optical devices exposed to
direct sunlight as installed on the vehicle.
    Filament means that part of the light source or light emitting
element(s), such as a resistive element, the excited portion of a
specific mixture of gases under pressure, or any part of other energy
conversion sources, that generates radiant energy which can be seen.
    Flash means a cycle of activation and deactivation of a lamp by
automatic means continuing until stopped either automatically or
manually.

    Fully opened means the position of the headlamp concealment device
in which the headlamp is in the design open operating position.
    H-V axis means the line from the center of the principal filament
of a lamp to the intersection of the horizontal (H) and vertical (V)
lines of a photometric test screen.
    Haze means the cloudy or turbid appearance of an otherwise
transparent specimen caused by light scattered from within the specimen
or from its surface.
    Headlamp means a lighting device providing an upper and/or a lower
beam used for providing illumination forward of the vehicle.
    Headlamp concealment device means a device, with its operating
system and components, that provides concealment of the headlamp when
it is not in use, including a movable headlamp cover and a headlamp
that displaces for concealment purposes.
    Headlamp mechanical axis means the line formed by the intersection
of a horizontal and a vertical plane through the light source parallel
to the longitudinal axis of the vehicle. If the mechanical axis of the
headlamp is not at the geometric center of the lens, then the location
will be indicated by the manufacturer on the headlamp.
    Headlamp test fixture means a device designed to support a headlamp
or headlamp assembly in the test position specified in the laboratory
tests and whose mounting hardware and components are those necessary to
operate the headlamp as installed in a motor vehicle.
    High-mounted stop lamp means a lamp mounted high and possibly
forward of the tail, stop, and rear turn signal lamps intended to give
a steady stop warning through intervening vehicles to operators of
following vehicles.
    Identification lamps are lamps used in groups of three, in a
horizontal row, which show to the front or rear or both, having lamp
centers spaced not less than [6 in] 15.2 mm nor more than [12 in] 30.4
mm apart, mounted on the permanent structure as near as practicable to
the vertical centerline and the top of the vehicle to identify certain
types of vehicles.
    Integral beam headlamp means a headlamp (other than a standardized
sealed beam headlamp designed to conform to paragraph S10.13 or a
replaceable bulb headlamp designed to conform to paragraph S10.15)
comprising an integral and indivisible optical assembly including lens,
reflector, and light source, except that a headlamp conforming to
paragraph S10.18.8 or paragraph S10.18.9 may have a lens designed to be
replaceable.
    License plate lamp means a lamp used to illuminate the license
plate on the rear of a vehicle.
    Lower beam means a beam intended to illuminate the road and its
environs ahead of the vehicle when meeting or closely following another
vehicle.
    Material means the type and grade of plastics, composition, and
manufacturer's designation number and color.
    Mechanically aimable headlamp means a headlamp having three pads on
the lens, forming an aiming plane used for laboratory photometric
testing and for adjusting and inspecting the aim of the headlamp when
installed on the vehicle.
    Motor driven cycle means every motorcycle, including every motor
scooter, with a motor which produces not more than 5 horsepower, and
every bicycle with motor attached.
    Motorcycle or motor driven cycle headlamp means a major lighting
device used to produce general illumination ahead of the vehicle.
    Mounting ring means the adjustable ring upon which a sealed beam
unit is mounted.
    Mounting ring (type F sealed beam) means the adjustable ring upon
which a sealed beam unit is mounted and which forces the sealed beam
unit to seat against the aiming ring when assembled into a sealed beam
assembly.
    Multiple compartment lamp means a device which gives its indication
by two or more separately lighted areas which are joined by one or more
common parts, such as a housing or lens.
    Multiple lamp arrangement means an array of two or more separate
lamps on each side of the vehicle which operate together to give a
signal.
    Optically combined means a lamp having a single or two filament
light source or two or more separate light sources that operate in
different ways, and has its optically functional lens area wholly or
partially common to two or more lamp functions.
    Overall width means the nominal design dimension of the widest part
of the vehicle, exclusive of signal lamps, marker lamps, outside
rearview mirrors, flexible fender extensions, mud flaps, and outside
door handles determined with doors and windows closed, and the wheels
in the straight-ahead position. Running boards may also be excluded
from the determination of overall width if they do not extend beyond
the width as determined by the other items excluded by this definition.
    Parking lamps are lamps on both the left and right of the vehicle
which show to the front and are intended to mark the vehicle when
parked or serve as a reserve front position indicating system in the
event of headlamp failure.
    Protected means material used in inner lenses for optical devices
where such lenses are protected from exposure to the sun by an outer
lens made of materials meeting the requirements for exposed plastics.
    Rated voltage means the nominal circuit or vehicle electrical
system voltage classification.
    Reflex reflectors are devices used on vehicles to give an
indication to approaching drivers using reflected light from the lamps
of the approaching vehicle.
    Remote reading indicator means a device that is not mounted in its
entirety on a headlamp or headlamp aiming or headlamp mounting
equipment, but otherwise meets the definition of a direct reading
indicator.
    Replaceable bulb headlamp means a headlamp comprising a bonded lens
and reflector assembly and one or two replaceable light sources, except
that a headlamp conforming to paragraph S10.18.8 or paragraph S10.18.9
may have a lens designed to be replaceable.
    Replaceable light source means an assembly of a capsule, base, and
terminals that is designed to conform to the requirements of Appendix A
or Appendix B of 49 CFR part 564 Replaceable Light Source Information
of this Chapter.
    Retaining ring means the clamping ring that holds a sealed beam
unit against a mounting ring.
    Retaining ring (type F sealed beam) means the clamping ring that
holds a sealed beam unit against a mounting ring, and that provides an
interface between the unit's aiming/seating pads and the headlamp aimer
adapter (locating plate).
    School bus signal lamps are alternately flashing lamps mounted
horizontally both front and rear, intended to identify a vehicle as a
school bus and to inform other users of the highway that such vehicle
is stopped on the highway to take on or discharge school children.
    Sealed beam headlamp means an integral and indivisible optical
assembly including the light source with ``SEALED BEAM'' molded in the
lens.
    Sealed beam headlamp assembly means a major lighting assembly which
includes one or more sealed beam units used to provide general
illumination ahead of the vehicle.
    Seasoning means the process of energizing the filament of a
headlamp at design voltage for a period of time equal

to 1% of design life, or other equivalent method.
    Semiautomatic headlamp beam switching device is one which provides
either automatic or manual control of beam switching at the option of
the driver. When the control is automatic the headlamps switch from the
upper beam to the lower beam when illuminated by the headlamps on an
approaching vehicle and switch back to the upper beam when the road
ahead is dark. When the control is manual, the driver may obtain either
beam manually regardless of the conditions ahead of the vehicle.
    Side marker lamps are lamps which show to the side of the vehicle,
mounted on the permanent structure of the vehicle as near as
practicable to the front and rear edges to indicate the overall length
of the vehicle. Additional lamps may also be mounted at intermediate
locations on the sides of the vehicle.
    Stop lamps are lamps giving a steady light to the rear of a vehicle
to indicate a vehicle is stopping or diminishing speed by braking.
    Taillamps are steady burning low intensity lamps used to designate
the rear of a vehicle.
    Test voltage means the specified voltage and tolerance to be used
when conducting a test.
    Turn signal lamps are the signaling element of a turn signal system
which indicates the intention to turn or change direction by giving a
flashing light on the side toward which the turn will be made.
    Turn signal flasher means a device which causes a turn signal lamp
to flash as long as it is turned on.
    Turn signal operating unit means an operating unit that is part of
a turn signal system by which the operator of a vehicle causes the
signal units to function.
    Upper beam means a beam intended primarily for distance
illumination and for use when not meeting or closely following other
vehicles.
    Vehicle headlamp aiming device or VHAD means motor vehicle
equipment, installed either on a vehicle or headlamp, which is used for
determining the horizontal or vertical aim, or both the vertical and
horizontal aim of the headlamp.
    Vehicular hazard warning signal flasher means a device which, as
long as it is turned on, causes all the required turn signal lamps to
flash.
    Vehicular hazard warning signal operating unit means a driver
controlled device which causes all required turn signal lamps to flash
simultaneously to indicate to approaching drivers the presence of a
vehicular hazard.
    Visually/optically aimable headlamp means a headlamp which is
designed to be visually/optically aimable in accordance with the
requirements of paragraph S10.18.9 of this standard.
    S5 References to SAE publications.
    S5.1 Each required lamp, reflective device, and item of associated
equipment must be designed to conform to the requirements of applicable
SAE publications as referenced and subreferenced in this standard. The
words ``it is recommended that,'' ``recommendations,'' or ``should be''
appearing in any SAE publication referenced or subreferenced in this
standard must be read as setting forth mandatory requirements.
    S5.2 Incorporation by reference. The Director of the Federal
Register approves the incorporation by reference of the following
material in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. All
material is available for inspection at the NHTSA Reading Room, 1200
New Jersey Avenue, SE., Washington, DC 20590, or at NARA. For
information on the availability of this material at NARA, call 202-741-
6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html
.

    The material is also available at the publisher whose name and
address follow the standard number:
    1. Society of Automotive Engineers (SAE) Standard J602, revised AUG
1963, ``Headlamp Aiming Device for Mechanically Aimable Sealed Beam
Headlamp Units.'' Society of Automotive Engineers, Inc., 400
Commonwealth Drive, Warrendale, PA 15096.
    2. Society of Automotive Engineers (SAE) Standard J941b, revised
FEB 1969, ``Motor Vehicle Driver's Eye Range.'' Society of Automotive
Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.
    3. Society of Automotive Engineers (SAE) Standard J602, revised OCT
1980, ``Headlamp Aiming Device for Mechanically Aimable Sealed Beam
Headlamp Units.'' Society of Automotive Engineers, Inc., 400
Commonwealth Drive, Warrendale, PA 15096.
    4. Society of Automotive Engineers (SAE) Standard J2009, revised
FEB 1993, ``Forward Discharge Lighting Systems.'' Society of Automotive
Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.
    5. Society of Automotive Engineers (SAE) Standard J573d, revised
DEC 1968, ``Lamp Bulbs and Sealed Units.'' Society of Automotive
Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.
    6. Society of Automotive Engineers (SAE) Standard J567b, revised
APR 1964, ``Bulb Sockets.'' Society of Automotive Engineers, Inc., 400
Commonwealth Drive, Warrendale, PA 15096.
    7. International Commission on Illumination (C.I.E.) 1931
Chromaticity Diagram. CIE Central Bureau, Kegelgasse 27, A-1030 Vienna,
Austria.
    8. General Services Administration (GSA) Federal Specification L-S-
300, approved September 1965, ``Sheeting and Tape, Reflective:
Nonexposed Lens, Adhesive Backing.'' Superintendent of Documents, U.S.
Government Printing Office, Washington, DC 20402, telephone 202-512-
1800.
    9. American Society for Testing and Materials (ASTM) D4956-90,
published December 1990, ``Standard Specification for Retroreflective
Sheeting for Traffic Control.'' ASTM International, 100 Barr Harbor
Drive, PO Box C700, Conshohocken, PA 19428-2959.
    10. ECE 48 E/ECE/324-E/ECE/TRANS/505, Rev.1/ADD.47/Rev.1/Corr.2, 26
February 1996, ``Uniform Provisions Concerning the Approval of Vehicles
with Regard to the Installation of Lighting and Light-Signaling
Devices.'' United Nations, Conference Services Division, Distribution
and Sales Section, Office C.115-1, Palais des Nations, CH-1211, Geneva
10, http://www.unece.org/trans/main/wp29/wp29regs.html.

    11. American Society for Testing and Materials (ASTM) D1003-92,
published December 1992, ``Standard Test Method for Haze and Luminous
Transmittance of Transparent Plastics.'' ASTM International, 100 Barr
Harbor Drive, PO Box C700, Conshohocken, PA 19428-2959.
    12. American Society for Testing and Materials (ASTM) E308-66,
reapproved 1981, ``Standard Practice for Spectrophotometry and
Description of Color in CIE 1931 System.'' ASTM International, 100 Barr
Harbor Drive, PO Box C700, Conshohocken, PA 19428-2959.
    13. American Society for Testing and Materials (ASTM) B117-73,
reapproved 1979, ``Standard Method of Salt Spray (Fog) Testing.'' ASTM
International, 100 Barr Harbor Drive, PO Box C700, Conshohocken, PA
19428-2959.
    14. American Society for Testing and Materials (ASTM) Co. 05.04
1985, ``Annual Book of ASTM Standards: Test Methods for Rating Motor,
Diesel, Aviation Fuels,'' Section I, parts A2.3.2, A2.3.3, and A2.7 in
Annex 2. ASTM International, 100 Barr Harbor Drive, PO

Box C700, Conshohocken, PA 19428-2959.
    15. American Society for Testing and Materials (ASTM) D362-84,
published March 1984, ``Standard Specification for Industrial Grade
Toluene.'' ASTM International, 100 Barr Harbor Drive, PO Box C700,
Conshohocken, PA 19428-2959.
    16. American Society for Testing and Materials (ASTM) C150-77,
published April 1977, ``Standard Specification for Portland Cement.''
ASTM International, 100 Barr Harbor Drive, PO Box C700, Conshohocken,
PA 19428-2959.
    17. Illuminating Engineering Society of North America (IES) LM 45,
approved April 1980, ``IES Approved Method for Electrical and
Photometric Measurements of General Service Incandescent Filament
Lamps.'' Illuminating Engineering Society of North America, 345 East
47th St., New York, NY 10017.
    S6 Vehicle requirements.
    S6.1 Required lamps, reflective devices, and associated equipment
by vehicle type.
    S6.1.1 Quantity. Except as provided in succeeding paragraphs of
this S6.1.1 each vehicle must be equipped with at least the number of
lamps, reflective devices, and items of associated equipment specified
for that vehicle type and size in Table I and Section 6.6, designed to
conform to the requirements of this standard. Multiple license plate
lamps and backup lamps may be used to fulfill photometric requirements
for those functions.
    S<IP_ADDRESS> Conspicuity systems. Each trailer of 2032 mm or more in
overall width, and with a GVWR over 10,000 lbs., except a trailer
designed exclusively for living or office use, and each truck tractor
must be equipped with retroreflective sheeting, reflex reflectors, or a
combination of retroreflective sheeting and reflex reflectors as
specified in S8.2.
    S<IP_ADDRESS> High-mounted stop lamps. Each multipurpose passenger
vehicle, truck, and bus required by this standard to be equipped with a
high-mounted stop lamp, whose vertical centerline, when the vehicle is
viewed from the rear, is not located on a fixed body panel but
separates one or two moveable body sections, such as doors, which lacks
sufficient space to install a single high-mounted stop lamp on the
centerline above such body sections, must have two high-mounted stop
lamps identical in size and shape.
    S<IP_ADDRESS>.1 The two lamps must be located at the same height, with
one vertical edge of each lamp on the vertical edge of the body section
nearest the vehicle centerline.
    S<IP_ADDRESS> Truck tractor rear turn signal lamps. A truck tractor need
not be equipped with turn signal lamps mounted on the rear if the turn
signal lamps installed at or near the front are of double face
construction and are located such that they meet the photometric
requirements for double faced turn signal lamps specified in Footnote 6
of Table VII.
    S<IP_ADDRESS>.1 The flashing signal from a double faced signal lamp must
not be obliterated when subjected to external light rays from either in
front or behind, at any and all angles.
    S<IP_ADDRESS> Daytime running lamps. A passenger car, multipurpose
passenger vehicle, truck, or bus may be equipped with a pair of daytime
running lamps (DRLs) as specified in Table I and S7.10 of this
standard. DRLs may be any pair of lamps on the front of the vehicle,
whether or not required by this standard, other than parking lamps or
fog lamps.
    S6.1.2 Color. The color in all lamps and reflective devices to
which this standard applies must be as specified in Table I. The color
identified as amber is identical to the color identified as yellow.
    S6.1.3 Mounting location.
    S<IP_ADDRESS> Each lamp, reflective device, and item of associated
equipment must be securely mounted on a rigid part of the vehicle,
other than glazing, that is not designed to be removed except for
repair, within the mounting location and height limits as specified in
Table I, and in a location where it complies with all applicable
photometric requirements, effective projected luminous lens area
requirements, and visibility requirements with all obstructions
considered.
    S<IP_ADDRESS> When multiple lamp arrangements or multiple compartment
rear turn signal lamps, stop lamps, or taillamps are used, with only a
portion of the compartments or lamps installed on a rigid part of the
vehicle, that portion must meet at least the photometric requirements
for the applicable single compartment lamp.
    S<IP_ADDRESS> License plate lamp. The license plate lamp or lamps
installed on vehicles other than motorcycles and motor driven cycles
must be mounted so as to illuminate the license plate without
obstruction from any designed feature unless the lamp or lamps is (are)
designed to comply with all the photometric requirements with these
obstructions considered.
    S<IP_ADDRESS> High-mounted stop lamps.
    S<IP_ADDRESS>.1 Interior mounting. A high-mounted stop lamp mounted
inside the vehicle must have means provided to minimize reflections
from the light of the lamp upon the rear window glazing that might be
visible to the driver when viewed directly, or indirectly in the
rearview mirror.
    S<IP_ADDRESS>.2 Accessibility. Each high-mounted stop lamp must provide
access for convenient replacement of bulbs without special tools.
    S<IP_ADDRESS> Headlamp beam mounting.
    S<IP_ADDRESS>.1 Vertical headlamp arrangement.
    S<IP_ADDRESS>.1.1 Where multiple headlamps with single light sources are
installed in a vertical orientation the lower beam must be provided by
the uppermost headlamp.
    S<IP_ADDRESS>.1.2 Where headlamps with two vertically oriented light
sources are installed the lower beam must be provided by the uppermost
light source or by all light sources.
    S<IP_ADDRESS>.1.3 Where more than one lamp must be used for a motorcycle
headlighting system, the lamps must be mounted vertically, with the
lower beam as high as practicable.
    S<IP_ADDRESS>.2 Horizontal headlamp arrangement.
    S<IP_ADDRESS>.2.1 Where multiple headlamps with single light sources are
installed in a horizontal orientation the lower beam must be provided
by the most outboard headlamp.
    S<IP_ADDRESS>.2.2 Where headlamps with two horizontally oriented light
sources are installed the lower beam must be provided by the outboard
light source or by all light sources.
    S<IP_ADDRESS> Auxiliary lamps mounted near identification lamps. Each
auxiliary lamp must be located at least twice the distance from any
required identification lamp as the distance between two adjacent
required identification lamps.
    S6.1.4 Mounting height. The mounting height of each lamp and
reflective device must be measured from the center of the item, as
mounted on the vehicle at curb weight, to the road surface.
    S<IP_ADDRESS> High-mounted stop lamps.
    S<IP_ADDRESS>.1 A high-mounted stop lamp mounted below the rear window
must have no lens portion lower than 153 mm [6 in] below the lower edge
of the rear glazing on convertibles, or 77 mm [3 in] on other passenger
cars.
    S6.1.5 Activation. Each lamp must be activated as specified, in the
combinations specified, and in response to the inputs specified in
Table I and Table II.
    S<IP_ADDRESS> Hazard warning signal. In all passenger cars, multipurpose
passenger vehicles, trucks, and buses, the activation of the vehicular
hazard warning signal operating unit must

cause to flash simultaneously sufficient turn signal lamps to meet, as
a minimum, the turn signal photometric requirements of this standard.
    S<IP_ADDRESS> Simultaneous beam activation.
    S<IP_ADDRESS>.1 On any vehicle to which this standard applies where the
headlighting system is designed to conform to the photometric
requirements of UB1 of Table XVIII and LB1M or LB1V of Table XIX-a, the
lamps marked ``L'' or ``LF'' may remain permanently activated when the
lamps marked ``U'' or ``UF'' are activated.
    S<IP_ADDRESS>.2 On any vehicle to which this standard applies where an
integral beam headlighting system is designed to conform to the
photometric requirements of UB6 of Table XVIII and LB5M of Table XIX-b
or LB4V of Table XIX-c, the lower beam headlamps must remain
permanently activated when the upper beam headlamps are activated.
    S<IP_ADDRESS>.3 On any vehicle to which this section applies where the
headlighting system is designed to conform to the photometric
requirements of UB2 of Table XVIII and LB2M or LB2V of Table XIX-a, a
lower beam light source may remain permanently activated when an upper
beam light source is activated if the lower beam light source
contributes to the upper beam photometric compliance of the
headlighting system.
    S6.2 Impairment.
    S6.2.1 No additional lamp, reflective device, or other motor
vehicle equipment is permitted to be installed that impairs the
effectiveness of lighting equipment required by this standard.
    S6.2.2 If any required lamp or reflective device is obstructed by
motor vehicle equipment (e.g., mirrors, snow plows, wrecker booms,
backhoes, winches, etc.) including dealer installed equipment, and
cannot meet the applicable photometry and visibility requirements, the
vehicle must be equipped with an additional lamp or device of the same
type which meet all applicable requirements of this standard, including
photometry and visibility.
    S6.2.3 Headlamp obstructions.
    S<IP_ADDRESS> When activated in a steady burning state, headlamps must
not have any styling ornament or other feature, such as a translucent
cover or grill, in front of the lens.
    S<IP_ADDRESS> Headlamp wipers may be used in front of the lens provided
that the headlamp system is designed to conform with all applicable
photometric requirements with the wiper stopped in any position in
front of the lens.
    S6.3 Equipment combinations. Two or more lamps, reflective devices,
or items of associated equipment may be combined if the requirements
for each lamp, reflective device, and item of associated equipment are
met with the following exceptions:
    S6.3.1 No high-mounted stop lamp is permitted to be combined with
any other lamp or reflective device, other than with a cargo lamp.
    S6.3.2 No high-mounted stop lamp is permitted to be optically
combined with any cargo lamp.
    S6.3.3 No clearance lamp is permitted to be optically combined with
any taillamp.
    S6.4 Lens area, visibility and school bus signal lamp aiming.
    S6.4.1 Effective projected luminous lens area. Each turn signal
lamp, stop lamp, high-mounted stop lamp, and school bus signal lamp
must meet the applicable effective projected luminous lens area
requirement specified in Tables IV-a, IV-b, and IV-c.
    S6.4.2 Visibility. Each backup lamp, single or combination of dual
high-mounted stop lamp(s), and school bus signal lamp must meet the
applicable visibility requirement specified in Table V-a.
    S6.4.3 Visibility options. A manufacturer must certify compliance
of each lamp function to one of the following visibility requirement
options, and it may not thereafter choose a different option for that
vehicle:
    (a) Lens area option. When a vehicle is equipped with any lamp
listed in Table V-b each such lamp must provide not less than 1250 sq
mm of unobstructed effective projected luminous lens area in any
direction throughout the pattern defined by the corner points specified
in Table V-b for each such lamp; or
    (b) Luminous intensity option. When a vehicle is equipped with any
lamp listed in Table V-c each such lamp must provide a luminous
intensity of not less than that specified in Table V-c in any direction
throughout the pattern defined by the corner points specified in Table
V-c for each such lamp when measured in accordance with the photometry
test requirements of this standard.
    S6.4.4 Legacy visibility alternative. As an alternative to S6.4.3,
each passenger car and motorcycle, and each multipurpose passenger
vehicle, truck, trailer, and bus that is of less than 2032 mm overall
width, that are manufactured on or before September 1, 2011, and each
multipurpose passenger vehicle, truck, trailer, and bus that is of 2032
mm or more overall width, that are manufactured on or before September
1, 2014, must have each lamp located so that it meets the visibility
requirements specified in Table V-d.
    S6.4.5 School bus signal lamp aiming. Each school bus signal lamp
must be mounted on the vehicle with their aiming plane vertical and
normal to the vehicle longitudinal axis. Aim tolerance must be no more
than 5 in vertically and 10 in horizontally at 25 ft from the lamp. If
the lamps are aimed or inspected by use of the SAE J602, Headlamp
Aiming Device for Mechanically Aimable Sealed Beam Headlamp Units,
(August 1963) (incorporated by reference, see 571.108 S5.2 of this
title), the graduation settings for aim must be 2[deg] D and 0[deg]
sideways for aiming and the limits must be 3[deg] U to 7[deg] D and
from 10[deg] R to 10[deg] L for inspection.
    S6.5 Marking. A summary of the marking requirements of this
standard and their location in the standard is contained in Table III.
    S6.5.1 DOT marking. The lens of each original equipment and
replacement headlamp, and of each original equipment and replacement
beam contributor, and each replacement headlamp lens for an integral
beam or replaceable bulb headlamp, must be marked with the symbol
``DOT'' either horizontally or vertically to indicate certification
under 49 U.S.C. 30115.
    S<IP_ADDRESS> The DOT marking requirements for conspicuity materials are
specified in S8.2 of this standard.
    S<IP_ADDRESS> Each original equipment or replacement lamp or reflective
device specified in Table I, except for a headlamp, or an item of
associated equipment specified in S9 may be marked with the symbol
``DOT'' which constitutes a certification that it conforms to the
requirements of this standard.
    S6.5.2 DRL marking. Each original equipment and replacement lamp
used as a daytime running lamp (DRL), unless optically combined with a
headlamp, must be permanently marked ``DRL'' on its lens in letters not
less than 3 mm high.
    S6.5.3 Headlamp markings.
    S6.5.3. Trademark. The lens of each original and replacement
equipment headlamp, and of each original and replacement equipment beam
contributor must be marked with the name and/or trademark registered
with the U.S. Patent and Trademark Office of the manufacturer of such
headlamp or beam contributor, of its importer, or any manufacturer of a
vehicle equipped with such headlamp or beam contributor. Nothing in
this standard authorizes the marking of any such name and/or trademark
by one who is not the owner, unless the owner has consented to it.

    S<IP_ADDRESS> Voltage and trade number. Each original and replacement
equipment headlamp, and each original and replacement equipment beam
contributor must be marked with its voltage and with its part or trade
number.
    S<IP_ADDRESS> Sealed beam headlamp markings.
    S<IP_ADDRESS>.1 Each sealed beam headlamp lens must be molded with
``SEALED BEAM'' and the appropriate designation code as shown in Table
II in characters no less than 6.35 mm in size.
    S<IP_ADDRESS>.2 The face of any character molded on the surface of the
lens must not be raised more than 0.5 mm above the lens surface.
    S<IP_ADDRESS>.3 Type 1C1, 2C1, and 2D1 headlamps must have no raised
markings on the outside surface of the lens between the diameters of 40
mm and 90 mm about the lens center.
    S<IP_ADDRESS>.4 Type 1A1, 2A1, 2B1, and 2E1 headlamps must have no
raised markings on the outside surface of the lens within a diameter of
70 mm about the lens center.
    S<IP_ADDRESS>.5 Type LF, UF, 1G1, 2G1, and 2H1 headlamps must have no
raised markings on the outside surface of the lens within a diameter of
35 mm about the lens center.
    S<IP_ADDRESS>.6 A Type 1C1 replacement headlamp may be marked ``1''
rather than ``1C1''. A Type 2C1 replacement headlamp may be marked
``2'' rather than ``2C1''. A Type 2D1 replacement headlamp may be
marked ``TOP'' or ``2'' rather than ``2D1''.
    S<IP_ADDRESS> Replaceable bulb headlamp markings.
    S<IP_ADDRESS>.1 The lens of each replaceable bulb headlamp must bear
permanent marking in front of each replaceable light source with which
it is equipped that states either: The HB Type, if the light source
conforms to S11 of this standard for filament light sources, or the
bulb marking/designation provided in compliance with Section VIII of
Appendix A of 49 CFR Part 564 (if the light source conforms to S11 of
this standard for discharge light sources).
    S<IP_ADDRESS>.1.1 No marking need be provided if the only replaceable
light source in the headlamp is type HB1.
    S<IP_ADDRESS> Additional headlamp markings. Additional marking
requirements for headlamps are found in, S10.14.4, S10.15.4, S10.17.2,
S10.18.5, S10.18.7, and S10.18.9 of this standard.
    S6.6 Associated equipment.
    S6.6.1 All vehicles to which this standard applies, except
trailers, must be equipped with a turn signal operating unit, a turn
signal flasher, a turn signal pilot indicator, a headlamp beam
switching device, and an upper beam headlamp indicator meeting the
requirements of S9.
    S6.6.2 All vehicles to which this standard applies except trailers
and motorcycles must be equipped with a vehicular hazard warning
operating unit, a vehicular hazard warning signal flasher, and a
vehicular hazard warning signal pilot indicator meeting the
requirements of S9.
    S6.6.3 License plate holder. Each rear license plate holder must be
designed and constructed to provide a substantial plane surface on
which to mount the plate. The plane of the license plate mounting
surface and the plane on which the vehicle stands must be perpendicular
within  15[deg].
    S6.7 Replacement equipment.
    S6.7.1 General.
    S<IP_ADDRESS> Each replacement lamp, reflective device, or item of
associated equipment, including a combination lamp, must:
    (a) Be designed to conform to meet all requirements specified in
this standard for that type of lamp, reflective device, or other item
of equipment (in the case of a combination lamp, it must meet these
requirements for each function); and
    (b) Include all of the functions of the lamp, reflective device, or
item of associated equipment, including a combination lamp, it is
designed to replace or is capable of replacing (other than functions
not required by this standard).
    S<IP_ADDRESS> Each replacement lamp, reflective device, or item of
associated equipment, including a combination lamp, which is designed
or recommended for particular vehicle models must be designed so that
it does not take the vehicle out of compliance with this standard when
the individual device is installed on the vehicle. Except as provided
in S<IP_ADDRESS>, the determination of whether a vehicle would be taken out
of compliance with this standard when an individual device is installed
on the vehicle is made without regard to whether additional devices,
including separate lamps or reflective devices sold together with the
device, would also be installed.
    S<IP_ADDRESS> In the case of a lamp or other device that is used on each
side of the vehicle in pairs, the determination (for the purposes of
S<IP_ADDRESS>) of whether a vehicle would be taken out of compliance with
this standard when an individual device is installed on the vehicle is
made assuming that the other matched paired device would be installed
on the other side of the vehicle, whether or not the matched paired
devices are sold together. This provision does not limit the
responsibilities of manufacturers, distributors, dealers or motor
vehicle repair businesses under 49 U.S.C. 30122, Making safety devices
and elements inoperative.
    S6.7.2 Version of this standard. The requirements of S6.7.1 must be
met, at the option of the manufacturer, using either the current
version of this standard or the standard in effect at the time of
manufacture of the original equipment being replaced.
    S7 Signal lamp requirements.
    S7.1 Turn signal lamps.
    S7.1.1 Front turn signal lamps.
    S<IP_ADDRESS> Number. See Tables I-a and I-c.
    S<IP_ADDRESS> Color of light. See Tables I-a and I-c.
    S<IP_ADDRESS> Mounting location. See Tables I-a and I-c.
    S<IP_ADDRESS> Mounting height. See Tables I-a and I-c.
    S<IP_ADDRESS> Activation. See Tables I-a and I-c.
    S<IP_ADDRESS> Effective projected luminous lens area. See Table IV-a.
    S<IP_ADDRESS> Visibility. See S6.4.
    S<IP_ADDRESS> Indicator. See S9.3.
    S<IP_ADDRESS> Markings. See S6.5.
    S<IP_ADDRESS> Spacing to other lamps.
    S<IP_ADDRESS>.1 Each front turn signal lamp must also be designed to
comply with any additional photometry requirements based on its
installed spacing to other lamps as specified by this section. Where
more than one spacing relationship exists for a turn signal lamp the
requirement must be the one that specifies the highest luminous
intensity multiplier of Tables VI-a and VI-b.
    S<IP_ADDRESS>.2 Spacing measurement for non-reflector lamps. For any
front turn signal lamp that does not employ a reflector to meet
photometric requirements, the spacing must be measured from the light
source of the turn signal lamp to the lighted edge of any lower beam
headlamp, or any lamp such as an auxiliary lower beam headlamp or fog
lamp used to supplement the lower beam headlamp.
    S<IP_ADDRESS>.3 Spacing measurement for lamps with reflectors. For any
front turn signal lamp which employs a reflector, such as a parabolic
reflector, to meet photometric requirements, the spacing must be
measured from the geometric centroid of the turn signal lamp effective
projected luminous lens area to the lighted edge of any lower beam
headlamp, or any lamp such as an auxiliary lower beam headlamp or fog
lamp used to supplement the lower beam headlamp.
    S<IP_ADDRESS>.4 Spacing based photometric multipliers.

    (a) where the spacing measurement of S<IP_ADDRESS>.2 or S<IP_ADDRESS>.3
between a turn signal lamp and the lighted edge of any lower beam
headlamp is less than 100 mm the photometric multiplier must be 2.5.
    (b) where the spacing measurement of S<IP_ADDRESS>.2 or S<IP_ADDRESS>.3
between a turn signal lamp and the lighted edge of any lamp such as an
auxiliary lower beam headlamp or fog lamp used to supplement the lower
beam headlamp is at least 75 mm but less than 100 mm the photometric
multiplier of Table VI must be 1.5.
    (c) where the spacing measurement of S<IP_ADDRESS>.2 or S<IP_ADDRESS>.3
between a turn signal lamp and the lighted edge of any lamp such as an
auxiliary lower beam headlamp or fog lamp used to supplement the lower
beam headlamp is at least 60 mm but less than 75 mm the photometric
multiplier must be 2.0.
    (d) where the spacing measurement of S<IP_ADDRESS>.2 or S<IP_ADDRESS>.3
between a turn signal lamp and the lighted edge of any lamp such as an
auxiliary lower beam headlamp or fog lamp used to supplement the lower
beam headlamp is less than 60 mm the photometric multiplier must be
2.5.
    S<IP_ADDRESS> Multiple compartments and multiple lamps.
    S<IP_ADDRESS>.1 A multiple compartment lamp or multiple lamps may be
used to meet the photometric requirements of a front turn signal lamp.
    S<IP_ADDRESS>.2 If a multiple compartment lamp or multiple lamps are
used on a passenger car or on a multipurpose passenger vehicle, truck,
bus, or trailer of less than 2032 mm in overall width, and the distance
between adjacent light sources does not exceed 560 mm for two
compartment or lamp arrangements and does not exceed 410 mm for three
compartments or lamp arrangements, then the combination of the
compartments or lamps must be used to meet the photometric requirements
for the corresponding number of lighted sections specified in Tables
VI-a or VI-b.
    S<IP_ADDRESS>.3 If the distance between adjacent light sources exceeds
the previously stated dimensions, each compartment or lamp must comply
with the photometric requirements for one lighted section specified in
Tables VI-a or VI-b
    S<IP_ADDRESS>.4 Lamps installed on vehicles 2032 mm or more in overall
width. Multiple compartment front turn signal lamps installed on
multipurpose passenger vehicles, trucks, and buses 2032 mm or more in
overall width require measurement of the photometrics for the entire
lamp and not for individual compartments.
    S<IP_ADDRESS> Ratio to parking lamps and clearance lamps.
    S<IP_ADDRESS>.1 When a parking lamp, or a clearance lamp on a
multipurpose passenger vehicle, truck, trailer, or bus of 2032 mm or
more in overall width, is combined with a front turn signal lamp, the
luminous intensity of the front turn signal lamp at each identified
test point must not be less than the luminous intensity of the parking
lamp or clearance lamp at that same test point times the multiplier
shown for that test point in Tables VI-a or VI-b.
    S<IP_ADDRESS>.2 If a multiple compartment or multiple lamp arrangement
is used on a passenger car or on a multipurpose passenger vehicle,
truck, bus, or trailer of less than 2032 mm in overall width, and the
distance between the optical axes for both the parking lamp and turn
signal lamp is within 560 mm for two compartment or lamp arrangements
or 410 mm for three compartment or lamp arrangements, then the ratio
must be computed with all compartments or lamps lighted.
    S<IP_ADDRESS>.3 If a multiple compartment or multiple lamp arrangement
is used and the distance between optical axes for one of the functions
exceeds 560 mm for two compartment or lamp arrangements or 410 mm for
three compartments or lamp arrangements, then the ratio must be
computed for only those compartments or lamps where the parking lamp
and turn signal lamp are optically combined.
    S<IP_ADDRESS>.4 Where the clearance lamp is combined with the turn
signal lamp, and the maximum luminous intensity of the clearance lamp
is located below horizontal and within an area generated by a 1.0
radius around a test point, the ratio for the test point may be
computed using the lowest value of the clearance lamp luminous
intensity within the generated area.
    S<IP_ADDRESS> Photometry.
    S<IP_ADDRESS>.1 When tested according to the procedure of S14.2.1, each
front turn signal lamp must be designed to conform to the base
photometry requirements plus any applicable multipliers as shown in
Tables VI-a and VI-b for the number of lamp compartments or individual
lamps and the type of vehicle it is installed on.
    S<IP_ADDRESS>.2 As an alternative to S<IP_ADDRESS>.1, a front turn signal
lamp installed on a motorcycle may be designed to conform to the
photometry requirements of Table XIII-a when tested according to the
procedure of S14.2.1.
    S<IP_ADDRESS> Physical tests. Each front turn signal lamp must be
designed to conform to the performance requirements of the vibration
test, moisture test, dust test, and corrosion test of S14.5, and the
color test and plastic optical material test of S14.4.
    S7.1.2 Rear turn signal lamps.
    S<IP_ADDRESS> Number. See Tables I-a, I-b, and I-c.
    S<IP_ADDRESS> Color of light. See Tables I-a, I-b, and I-c.
    S<IP_ADDRESS> Mounting location. See Tables I-a, I-b, and I-c and
S<IP_ADDRESS>.
    S<IP_ADDRESS> Mounting height. See Tables I-a, I-b, and I-c.
    S<IP_ADDRESS> Activation. See Tables I-a, I-b, and I-c.
    S<IP_ADDRESS> Effective projected luminous lens area. See Table IV-a.
    S<IP_ADDRESS> Visibility. See S6.4.
    S<IP_ADDRESS> Indicator. See S9.3.
    S<IP_ADDRESS> Markings. See S6.5.
    S<IP_ADDRESS> Spacing to other lamps. No requirement.
    S<IP_ADDRESS> Multiple compartments and multiple lamps.
    S<IP_ADDRESS>.1 A multiple compartment lamp or multiple lamps may be
used to meet the photometric requirements of a rear turn signal lamp
provided the requirements of S<IP_ADDRESS> are met
    S<IP_ADDRESS>.2 If a multiple compartment lamp or multiple lamps are
used on a passenger car or on a multipurpose passenger vehicle, truck,
bus, or trailer of less than 2032 mm in overall width, and the distance
between adjacent light sources does not exceed 560 mm for two
compartment or lamp arrangements and does not exceed 410 mm for three
compartment or lamp arrangements, then the combination of the
compartments or lamps must be used to meet the photometric requirements
for the corresponding number of lighted sections specified in Table
VII.
    S<IP_ADDRESS>.3 If the distance between adjacent light sources exceeds
the previously stated dimensions, each compartment or lamp must comply
with the photometric requirements for one lighted section specified in
Table VII.
    S<IP_ADDRESS>.4 Lamps installed on vehicles 2032 mm or more in overall
width. Multiple compartment rear turn signal lamps installed on
multipurpose passenger vehicles, trucks, and buses 2032 mm or more in
overall width require measurement of the photometrics for the entire
lamp and not for individual compartments.
    S<IP_ADDRESS> Ratio to taillamps and clearance lamps.
    S<IP_ADDRESS>.1 When a taillamp, or a clearance lamp on a multipurpose
passenger vehicle, truck, trailer, or bus of 2032 mm or more in overall
width, is combined with a rear turn signal lamp, the luminous intensity
of the rear turn signal lamp at each identified test point must not be
less than the

luminous intensity of the taillamp or clearance lamp at that same test
point times the multiplier shown for that test point in Table VII.
    S<IP_ADDRESS>.2 If a multiple compartment or multiple lamp arrangement
is used on a passenger car or on a multipurpose passenger vehicle,
truck, bus, or trailer of less than 2032 mm in overall width, and the
distance between the optical axes for both the taillamp and turn signal
lamp is within 560 mm for two compartment or lamp arrangement or 410 mm
for three compartments or lamp arrangements, then the ratio must be
computed with all compartments or lamps lighted.
    S<IP_ADDRESS>.3 If a multiple compartment or multiple lamp arrangement
is used and the distance between optical axes for one of the functions
exceeds 560 mm for two compartment or lamp arrangements or 410 mm for
three compartment or lamp arrangements, then the ratio must be computed
for only those compartments or lamps where the taillamp and turn signal
lamp are optically combined.
    S<IP_ADDRESS>.4 Where the taillamp or clearance lamp is combined with
the turn signal lamp, and the maximum luminous intensity of the
taillamp or clearance lamp is located below horizontal and within an
area generated by a 0.5 [deg] radius around a test point for a taillamp
on a passenger car or on a multipurpose passenger vehicle, truck, bus,
or trailer of less than 2032 mm in overall width, or by a 1.0 [deg]
radius around a test point for a taillamp or clearance lamp on a
vehicle 2032 mm or more in overall width, the ratio for the test point
may be computed using the lowest value of the taillamp or clearance
lamp luminous intensity within the generated area.
    S<IP_ADDRESS> Photometry.
    S<IP_ADDRESS>.1 Each rear turn signal lamp must be designed to conform
to the photometry requirements of Table VII, when tested according to
the procedure of S14.2.1, for the number of lamp compartments or
individual lamps, the type of vehicle it is installed on, and the lamp
color as specified by this section.
    S<IP_ADDRESS>.2 As an alternative to S<IP_ADDRESS>.1, a rear turn signal
lamp installed on a motorcycle may be designed to conform to the
photometry requirements of Table XIII-a when tested according to the
procedure of S14.2.1.
    S<IP_ADDRESS> Physical tests. Each rear turn signal lamp must be
designed to conform to the performance requirements of the vibration
test, moisture test, dust test, and corrosion test of S14.5, and the
color test and plastic optical material test of S14.4.
    S7.1.3 Combined lamp bulb indexing.
    S<IP_ADDRESS> Each turn signal lamp optically combined with a taillamp
or a parking lamp, or clearance lamp where installed on a vehicle 2032
mm or more in overall width, where a two-filament bulb is used must
have a bulb with an indexing base and a socket designed so that bulbs
with non-indexing bases cannot be used.
    S<IP_ADDRESS> Removable sockets must have an indexing feature so that
they cannot be re-inserted into lamp housings in random positions,
unless the lamp will perform its intended function with random light
source orientation.
    S7.2 Taillamps.
    S7.2.1 Number. See Tables I-a, I-b, and I-c.
    S7.2.2 Color of light. See Tables I-a, I-b, and I-c.
    S7.2.3 Mounting location. See Tables I-a, I-b, and I-c and
S<IP_ADDRESS>.
    S7.2.4 Mounting height. See Tables I-a, I-b, and I-c.
    S7.2.5 Activation. See Tables I-a, I-b, and I-c.
    S7.2.6 Effective projected luminous lens area. No requirement.
    S7.2.7 Visibility. See S6.4.
    S7.2.8 Indicator. No requirement.
    S7.2.9 Markings. See S6.5.
    S7.2.10 Spacing to other lamps. No requirement.
    S7.2.11 Multiple compartments and multiple lamps.
    S<IP_ADDRESS> A multiple compartment lamp or multiple lamps may be used
to meet the photometric requirements of a taillamp provided the
requirements of S<IP_ADDRESS> are met.
    S<IP_ADDRESS> If a multiple compartment lamp or multiple lamps are used
and the distance between the optical axes does not exceed 560 mm for
two compartment or lamp arrangements and does not exceed 410 mm for
three compartment or lamp arrangements, then the combination of the
compartments or lamps must be used to meet the photometric requirements
for the corresponding number of lighted sections specified in Table
VIII.
    S<IP_ADDRESS> If the distance between optical axes exceeds the
previously stated dimensions, each compartment or lamp must comply with
the photometric requirements for one lighted section specified in Table
VIII.
    S<IP_ADDRESS> Taillamps installed on vehicles 2032 mm or more in
overall width. A maximum of two taillamps and/or two compartments per
side may be mounted closer together than 560 mm providing that each
compartment and/or lamp meets the single lighted section photometric
requirements specified in Table VIII. Each lamp and/or compartment
utilized in this manner must meet the single lighted section
requirements for all functions for which it is designed.
    S7.2.12 Ratio. See S<IP_ADDRESS> for rear turn signal lamps and S7.3.12
for stop lamps.
    S7.2.13 Photometry. Each taillamp must be designed to conform to
the photometry requirements of Table VIII, when tested according to the
procedure of S14.2.1, for the number of lamp compartments or individual
lamps and the type of vehicle it is installed on.
    S7.2.14 Physical tests. Each taillamp must be designed to conform
to the performance requirements of the vibration test, moisture test,
dust test, and corrosion test of S14.5, and the color test and plastic
optical material test of S14.4.
    S7.3 Stop lamps.
    S7.3.1 Number. See Tables I-a, I-b, and I-c.
    S7.3.2 Color of light. See Tables I-a, I-b, and I-c.
    S7.3.3 Mounting location. See Tables I-a, I-b, and I-c and
S<IP_ADDRESS>.
    S7.3.4 Mounting height. See Tables I-a, I-b, and I-c.
    S7.3.5 Activation. See Tables I-a, I-b, and I-c.
    S7.3.6 Effective projected luminous lens area. See Table IV-a.
    S7.3.7 Visibility. See S6.4.
    S7.3.8 Indicator. No requirement.
    S7.3.9 Markings. See S6.5.
    S7.3.10 Spacing to other lamps. No requirement.
    S7.3.11 Multiple compartments and multiple lamps.
    S<IP_ADDRESS> A multiple compartment lamp or multiple lamps may be used
to meet the photometric requirements of a stop lamp provided the
requirements of S<IP_ADDRESS> are met.
    S<IP_ADDRESS> If a multiple compartment lamp or multiple lamps are used
on a passenger car or on a multipurpose passenger vehicle, truck, bus,
or trailer of less than 2032 mm in overall width, and the distance
between adjacent light sources does not exceed 560 mm for two
compartment or lamp arrangements and does not exceed 410 mm for three
compartment or lamp arrangements, then the combination of the
compartments or lamps must be used to meet the photometric requirements
for the corresponding number of lighted sections specified in Table IX.
    S<IP_ADDRESS> If the distance between adjacent light sources exceeds
the previously stated dimensions, each compartment or lamp must comply
with the photometric requirements for one lighted section specified in
Table IX.

    S<IP_ADDRESS> Lamps installed on vehicles 2032 mm or more in overall
width. Multiple compartment stop lamps installed on multipurpose
passenger vehicles, trucks, and buses 2032 mm or more in overall width
require measurement of the photometrics for the entire lamp and not for
individual compartments.
    S7.3.12 Ratio to taillamps.
    S<IP_ADDRESS> When a taillamp is combined with a stop lamp, the
luminous intensity of the stop lamp at each identified test point must
not be less than the luminous intensity of the taillamp at that same
test point times the multiplier shown for that test point in Table IX.
    S<IP_ADDRESS> If a multiple compartment or multiple lamp arrangement is
used on a passenger car or on a multipurpose passenger vehicle, truck,
bus, or trailer of less than 2032 mm in overall width, and the distance
between the optical axes for both the taillamp and stop lamp is within
560 mm for two compartment or lamp arrangements or 410 mm for three
compartment or lamp arrangements, then the ratio must be computed with
all compartments or lamps lighted.
    S<IP_ADDRESS> If a multiple compartment or multiple lamp arrangement is
used and the distance between optical axes for one of the functions
exceeds 560 mm for two compartment or lamp arrangements or 410 mm for
three compartments or lamp arrangements, then the ratio must be
computed for only those compartments or lamps where the taillamp and
stop lamp are optically combined.
    S<IP_ADDRESS> Where the taillamp is combined with the stop lamp, and
the maximum luminous intensity of the taillamp is located below
horizontal and within an area generated by a 0.5 [deg] radius around a
test point for a taillamp on a passenger car or on a multipurpose
passenger vehicle, truck, bus, or trailer of less than 2032 mm in
overall width, or by a 1.0 [deg] radius around a test point for a
taillamp on a vehicle 2032 mm or more in overall width, the ratio for
the test point may be computed using the lowest value of the taillamp
luminous intensity within the generated area.
    S7.3.13 Photometry.
    S<IP_ADDRESS> Each stop lamp must be designed to conform to the
photometry requirements of Table IX, when tested according to the
procedure of S14.2.1, for the number of lamp compartments or individual
lamps and the type of vehicle it is installed on.
    S<IP_ADDRESS> A stop lamp installed on a motor driven cycle may be
designed to conform to the photometry requirements of Table XIII-b when
tested according to the procedure of S14.2.1.
    S7.3.14 Physical tests. Each stop lamp must be designed to conform
to the performance requirements of the vibration test, moisture test,
dust test, and corrosion test of S14.5, and the color test and plastic
optical material test of S14.4.
    S7.3.15 Combined lamp bulb indexing.
    S<IP_ADDRESS> Each stop lamp optically combined with a taillamp where a
two-filament bulb is used must have a bulb with an indexing base and a
socket designed so that bulbs with non-indexing bases cannot be used.
    S<IP_ADDRESS> Removable sockets must have an indexing feature so that
they cannot be re-inserted into lamp housings in random positions,
unless the lamp will perform its intended function with random light
source orientation.
    S7.4 Side marker lamps.
    S7.4.1 Number. See Tables I-a, I-b, and I-c.
    S7.4.2 Color of light. See Tables I-a, I-b, and I-c.
    S7.4.3 Mounting location. See Tables I-a, I-b, and I-c.
    S7.4.4 Mounting height. See Tables I-a, I-b, and I-c.
    S7.4.5 Activation. See Tables I-a, I-b, and I-c.
    S7.4.6 Effective projected luminous lens area. No requirement.
    S7.4.7 Visibility. No requirement.
    S7.4.8 Indicator. No requirement.
    S7.4.9 Markings. See S6.5.
    S7.4.10 Spacing to other lamps. No requirement.
    S7.4.11 Multiple compartments and multiple lamps. No requirement.
    S7.4.12 Ratio. No requirement.
    S7.4.13 Photometry.
    S<IP_ADDRESS> Each side marker lamp must be designed to conform to the
photometry requirements of Table X, when tested according to the
procedure of S14.2.1, for the lamp color as specified by this section.
    S<IP_ADDRESS> Inboard photometry. For each motor vehicle less than 30
feet in overall length and less than 2032 mm in overall width, the
minimum photometric intensity requirements for a side marker lamp may
be met for all inboard test points at a distance of 15 feet from the
vehicle and on a vertical plane that is perpendicular to the
longitudinal axis of the vehicle and located midway between the front
and rear side marker lamps.
    S7.4.14 Physical tests. Each side marker lamp must be designed to
conform to the performance requirements of the vibration test, moisture
test, dust test, and corrosion test of S14.5, and the color test and
plastic optical material test of S14.4.
    S7.5 Clearance and identification lamps.
    S7.5.1 Number. See Tables I-a and I-b.
    S7.5.2 Color of light. See Tables I-a and I-b.
    S7.5.3 Mounting location. See Tables I-a and I-b.
    S7.5.4 Mounting height. See Tables I-a and I-b.
    S7.5.5 Activation. See Tables I-a and I-b.
    S7.5.6 Effective projected luminous lens area. No requirement.
    S7.5.7 Visibility. No requirement.
    S7.5.8 Indicator. No requirement.
    S7.5.9 Markings. See S6.5.
    S7.5.10 Spacing to other lamps. No requirement.
    S7.5.11 Multiple compartments and multiple lamps. No requirement.
    S7.5.12 Ratio.
    S<IP_ADDRESS> Clearance lamps. See S<IP_ADDRESS> for front turn signal
lamps and S<IP_ADDRESS> for rear turn signal lamps.
    S<IP_ADDRESS> Identification lamps. No requirement.
    S7.5.13 Photometry. Each clearance or identification lamp must be
designed to conform to the photometry requirements of Table XI, for the
applicable lamp color, when tested according to the procedure of
S14.2.1.
    S7.5.14 Physical tests. Each clearance and identification must be
designed to conform to the performance requirements of the vibration
test, moisture test, dust test, and corrosion test of S14.5, and the
color test and plastic optical material test of S14.4.
    S7.6 Backup lamps.
    S7.6.1 Number. See Table I-a and S6.1.1.
    S7.6.2 Color of light.
    S<IP_ADDRESS> See Table I-a.
    S<IP_ADDRESS> A backup lamp may project incidental red, yellow, or white
light through reflectors or lenses that are adjacent, close to, or a
part of the lamp assembly.
    S7.6.3 Mounting location. See Table I-a.
    S7.6.4 Mounting height. No requirement.
    S7.6.5 Activation. See Table I-a.
    S7.6.6 Effective projected luminous lens area. No requirement.
    S7.6.7 Visibility. See Table V-a.
    S7.6.8 Indicator. No requirement.
    S7.6.9 Markings. See S6.5.
    S7.6.10 Spacing to other lamps. No requirement.
    S7.6.11 Multiple compartments and multiple lamps. No requirement.
    S7.6.12 Ratio. No requirement.
    S7.6.13 Photometry. Each backup lamp must be designed to conform to

the photometry requirements of Table XII, when tested according to the
procedure of S14.2.1, as specified by this section.
    S7.6.14 Physical tests. Each backup lamp must be designed to
conform to the performance requirements of the vibration test, moisture
test, dust test, and corrosion test of S14.5, and the color test and
plastic optical material test of S14.4.
    S7.7 License plate lamps.
    S7.7.1 Number. See Tables I-a, I-b, and I-c and S6.1.1.
    S7.7.2 Color of light. See Tables I-a, I-b, and I-c.
    S7.7.3 Mounting location. See Tables I-a, I-b, and I-c.
    S7.7.4 Mounting height. See Tables I-a, I-b, and I-c.
    S7.7.5 Activation. See Tables I-a, I-b, and I-c.
    S7.7.6 Effective projected luminous lens area. No requirement.
    S7.7.7 Visibility. No requirement.
    S7.7.8 Indicator. No requirement.
    S7.7.9 Markings. See S6.5.
    S7.7.10 Spacing to other lamps. No requirement.
    S7.7.11 Multiple compartments and multiple lamps. No requirement.
    S7.7.12 Ratio. No requirement.
    S7.7.13 Photometry.
    S<IP_ADDRESS> Each license plate lamp must be designed to conform to
the photometry requirements of this section when tested according to
the procedure of S14.2.2.
    S<IP_ADDRESS> An illumination value of no less than 8 lx [0.75 fc] must
be met at each test station target location shown in Figure 19.
    S<IP_ADDRESS> The ratio of the average of the two highest illumination
values divided by the average of the two lowest illumination values
must not exceed 20:1 for vehicles other than motorcycles and motor
driven cycles.
    S<IP_ADDRESS> The ratio of the highest illumination value divided by
the average of the two lowest illumination values must not exceed 15:1
for motorcycles and motor driven cycles.
    S7.7.14 Physical tests. Each license plate lamp must be designed to
conform to the performance requirements of the vibration test, moisture
test, dust test, and corrosion test of S14.5, and the color test and
plastic optical material test of S14.4.
    S7.7.15 Installation.
    S<IP_ADDRESS> Each license plate lamp installed on a vehicle other than
a motorcycle or motor driven cycle must be of such size and design as
to provide illumination on all parts of a 150 mm by 300 mm test plate.
    S<IP_ADDRESS> Each license plate lamp installed on a motorcycle or
motor driven cycle must be of such size and design as to provide
illumination on all parts of a 100 mm by 175 mm test plate.
    S<IP_ADDRESS> The light rays must reach all portions of an imaginary
plate of the same size at least 25 mm ahead of the actual plate
measured perpendicular to the plane of the plate.
    S<IP_ADDRESS> Incident light from single lamp. When a single lamp as
shown in Figure 20 is used to illuminate the license plate, the lamp
and license plate holder must bear such relation to each other that at
no point on the plate must the incident light make an angle of less
than 8[deg] to the plane of the plate, this angle being measured from
the edge of the light emitting surface of the lamp farthest from the
surface of the plate.
    S<IP_ADDRESS> Incident light from multiple lamps. When two or more
lamps as shown in Figure 20 are used to illuminate the license plate,
the minimum 8[deg] incident light angle must apply only to that portion
of the plate which the particular lamp is designed to illuminate. The
angle must be measured in the same manner as S<IP_ADDRESS>.
    S7.8 Parking lamps.
    S7.8.1 Number. See Table I-a.
    S7.8.2 Color of light. See Table I-a.
    S7.8.3 Mounting location. See Table I-a.
    S7.8.4 Mounting height. See Table I-a.
    S7.8.5 Activation. See Table I-a.
    S7.8.6 Effective projected luminous lens area. No requirement.
    S7.8.7 Visibility. See S6.4.
    S7.8.8 Indicator. No requirement.
    S7.8.9 Markings. See S6.5.
    S7.8.10 Spacing to other lamps. No requirement.
    S7.8.11 Multiple compartments and multiple lamps. No requirement.
    S7.8.12 Ratio. See S<IP_ADDRESS> for front turn signal lamps.
    S7.8.13 Photometry. Each parking lamp must be designed to conform
to the photometry requirements of Table XIV, when tested according to
the procedure of S14.2.1, as specified by this section.
    S7.8.14 Physical tests. Each parking lamp must be designed to
conform to the performance requirements of the vibration test, moisture
test, dust test, and corrosion test of S14.5, and the color test and
plastic optical material test of S14.4.
    S7.9 High-mounted stop lamps.
    S7.9.1 Number. See Table I-a and S<IP_ADDRESS>.
    S7.9.2 Color of light. See Table I-a.
    S7.9.3 Mounting location. See Table I-a.
    S7.9.4 Mounting height. See Table I-a and S<IP_ADDRESS>.
    S7.9.5 Activation. See Table I-a.
    S7.9.6 Effective projected luminous lens area. See Table IV-b.
    S7.9.7 Visibility. See Table V-a.
    S7.9.8 Indicator. No requirement.
    S7.9.9 Markings. See S6.5
    S7.9.10 Spacing to other lamps. No requirement.
    S7.9.11 Multiple compartments and multiple lamps. No requirement.
    S7.9.12 Ratio. No requirement.
    S7.9.13 Photometry. Each high-mounted stop lamp must be designed to
conform to the photometry requirements of Table XV, when tested
according to the procedure of S14.2.1, as specified by this section.
    S7.9.14 Physical tests.
    S<IP_ADDRESS>.1 Each high-mounted stop lamp must be designed to conform
to the performance requirements of the vibration test of S14.5, and the
color test and plastic optical material test of S14.4.
    S<IP_ADDRESS>.2 Each high-mounted stop lamp that is not mounted inside
the vehicle must be designed to conform to the performance requirements
of the moisture test, dust test, and corrosion test of S14.5.
    S7.10 Daytime running lamps (DRLs).
    S7.10.1 Number. See Table I-a.
    S7.10.2 Color of light. See Table I-a.
    S7.10.3 Mounting location. See Table I-a.
    S7.10.4 Mounting height. See Table I-a. and S7.10.13(b).
    S7.10.5 Activation. See Table I-a. and S<IP_ADDRESS>(c).
    S7.10.6 Effective projected luminous lens area. No requirement.
    S7.10.7 Visibility. No requirement.
    S7.10.8 Indicator. No requirement.
    S7.10.9 Markings. See S6.5.
    S7.10.10 Spacing to other lamps.
    S<IP_ADDRESS> Spacing to turn signal lamps. Each DRL not optically
combined with a turn signal lamp must be located on the vehicle so that
the distance from its lighted edge to the optical center of the nearest
turn signal lamp is not less than 100 mm unless,
    (a) The luminous intensity of the DRL is not more than 2,600 cd at
any location in the beam and the turn signal lamp meets 2.5 times the
base front turn signal photometric requirements, or
    (b) The DRL is optically combined with a lower beam headlamp and
the turn signal lamp meets 2.5 times the base front turn signal
photometric requirements, or
    (c) The DRL is deactivated when the turn signal or hazard warning
signal lamp is activated.
    S7.10.11 Multiple compartments and multiple lamps. No requirement.
    S7.10.12 Ratio. No requirement.
    S7.10.13 Photometry. Each DRL must have a luminous intensity not
less

than 500 cd at test point H-V, nor more than 3,000 cd at any location
in the beam when tested according to the procedure of S14.2.4 as
specified by this section, unless it is:
    (a) A lower beam headlamp intended to operate as a DRL at full
voltage, or a voltage lower than used to operate it as a lower beam
headlamp, or
    (b) An upper beam headlamp intended to operate as a DRL, whose
luminous intensity at test point H-V is not more than 7,000 cd, and
whose mounting height is not higher than 864 mm.
    S7.10.14 Physical tests. Each DRL that is not combined with another
required lamp must be designed to conform to the performance
requirements of the color test and plastic optical material test of
S14.4.
    S7.11 School bus signal lamps.
    S7.11.1 Number. See Table I-a.
    S7.11.2 Color of light. See Table I-a.
    S7.11.3 Mounting location. See Table I-a.
    S7.11.4 Mounting height. See Table I-a.
    S7.11.5 Activation. See Table I-a.
    S7.11.6 Effective projected luminous lens area. See Table IV-c.
    S7.11.7 Visibility. See Table V-a.
    S7.11.8 Indicator. No requirement.
    S7.11.9 Markings. See S6.5.
    S7.11.10 Spacing to other lamps. No requirement.
    S7.11.11 Multiple compartments and multiple lamps. No requirement.
    S7.11.12 Ratio. No requirement.
    S7.11.13 Photometry. Each school bus signal lamp must be designed
to conform to the photometry requirements of Table XVII, when tested
according to the procedure of S14.2.1, for the lamp color as specified
by this section.
    S7.11.14 Physical tests. Each school bus signal lamp must be
designed to conform to the performance requirements of the vibration
test, moisture test, dust test, and corrosion test of S14.5, and the
color test and plastic optical material test of S14.4.
    S8 Reflective device requirements.
    S8.1 Reflex reflectors.
    S8.1.1 Number. See Tables I-a, I-b, and I-c.
    S8.1.2 Color. See Tables I-a, I-b, and I-c.
    S8.1.3 Mounting location. See Tables I-a, I-b, and I-c.
    S8.1.4 Mounting height. See Tables I-a, I-b, and I-c.
    S8.1.5 Activation. No requirement.
    S8.1.6 Effective projected luminous lens area. No requirement.
    S8.1.7 Visibility. No requirement.
    S8.1.8 Indicator. No requirement.
    S8.1.9 Markings. See S6.5.
    S8.1.10 Spacing to other lamps or reflective devices. No
requirement.
    S8.1.11 Photometry. Each reflex reflector must be designed to
conform to the photometry requirements of Table XVI-a when tested
according to the procedure of S14.2.3 for the reflex reflector color as
specified by this section.
    S8.1.12 Physical tests. Each reflex reflector must be designed to
conform to the performance requirements of the vibration test, moisture
test, dust test, and corrosion test of S14.5, and the color test and
plastic optical material test of S14.4.
    S8.1.13 Alternative side reflex reflector material. Reflective
material conforming to Federal Specification L-S-300, Sheeting and
Tape, Reflective; Non-exposed Lens, Adhesive Backing, (September 7,
1965) (incorporated by reference, see 571.108 S5.2 of this title), may
be used for side reflex reflectors if this material as used on the
vehicle, meets the performance requirements of Table XVI-a.
    S8.2 Conspicuity systems. The requirement for conspicuity systems
may be met with retroreflective sheeting, conspicuity reflex
reflectors, or a combination of retroreflective sheeting and
conspicuity reflex reflectors.
    S8.2.1 Retroreflective sheeting.
    S<IP_ADDRESS> Retroreflective sheeting must consist of a smooth, flat,
transparent exterior film with retroreflective elements embedded or
suspended beneath the film so as to form a non-exposed retroreflective
optical system.
    S<IP_ADDRESS> Retroreflective sheeting material. Retroreflective
sheeting must meet the requirements, except photometry, of ASTM D 4956-
90, Standard for Retroreflective Sheeting for Traffic Control,
(incorporated by reference, see 571.108 S5.2 of this title) for Type V
Sheeting. Sheeting of Grade DOT-C2 of no less than 50 mm wide, Grade
DOT-C3 of no less than 75 mm wide, or Grade DOT-C4 of no less than 100
mm wide may be used.
    S<IP_ADDRESS> Certification marking. The letters DOT-C2, DOT-C3, or DOT-
C4, as appropriate, constituting a certification that the
retroreflective sheeting conforms to the requirements of this standard,
must appear at least once on the exposed surface of each white or red
segment of retroreflective sheeting, and at least once every 300 mm on
retroreflective sheeting that is white only. The characters must be not
less than 3 mm high, and must be permanently stamped, etched, molded,
or printed in indelible ink.
    S<IP_ADDRESS> Application pattern.
    S<IP_ADDRESS>.1 Alternating red and white materials.
    S<IP_ADDRESS>.1.1 As shown in Figures 12-1 and 12-2, where alternating
material is installed, except for a segment that is trimmed to clear
obstructions, or lengthened to provide red sheeting near red lamps,
alternating material must be installed with each white and red segment
having a length of 300  150 mm.
    S<IP_ADDRESS>.1.2 Neither white nor red sheeting must represent more
than two thirds the aggregate of any continuous strip marking the width
of a trailer, or any continuous or broken strip marking its length.
    S<IP_ADDRESS> Application location. Need not be installed, as
illustrated in Figure 12-2, on discontinuous surfaces such as outside
ribs, stake post pickets on platform trailers, and external protruding
beams, or to items of equipment such as door hinges and lamp bodies on
trailers and body joints, stiffening beads, drip rails, and rolled
surfaces on truck tractors.
    S<IP_ADDRESS> Application spacing. As illustrated in Figure 12-2, the
edge of any white sheeting must not be located closer than 75 mm to the
edge of the luminous lens area of any red or amber lamp that is
required by this standard. The edge of any red sheeting must not be
located closer than 75 mm to the edge of the luminous lens area of any
amber lamp that is required by this standard.
    S<IP_ADDRESS> Photometry. Each retroreflective sheeting must be designed
to conform to the photometry requirements of Table XVI-c when tested
according to the procedure of S14.2.3 for the color and grade as
specified by this section.
    S8.2.2 Conspicuity reflex reflectors.
    S<IP_ADDRESS> Certification marking. The exposed surface of each
conspicuity reflex reflector must be marked with the letters DOT-C
which constitutes a certification that the reflector conforms to the
conspicuity reflex reflector requirements of this standard. The
certification must be not less than 3 mm high, and must be permanently
stamped, etched, molded, or printed in indelible ink.
    S<IP_ADDRESS> Application pattern.
    S<IP_ADDRESS>.1 Alternating red and white materials. Conspicuity reflex
reflectors must be installed in a repetitive pattern of two or three
white reflectors alternating with two or three red reflectors, with the
center of each reflector not more than 100 mm from the center of each
adjacent reflector.
    S<IP_ADDRESS>.2 White material. White conspicuity reflex reflectors must
be installed with the center of each reflector not more than 100 mm
from the center of each adjacent reflector.

    S<IP_ADDRESS> Photometry.
    S<IP_ADDRESS>.1 Each red conspicuity reflex reflector must be designed
to conform to the photometry requirements of Table XVI-a for a red
reflex reflector and Table XVI-b for a red conspicuity reflex reflector
when tested according to the procedure of S14.2.3 as specified by this
section.
    S<IP_ADDRESS>.2 Each white conspicuity reflex reflector installed in
only a horizontal orientation must be designed to conform to the
photometry requirements of Table XVI-a for a white reflex reflector and
Table XVI-b for a white horizontal conspicuity reflex reflector when
tested according to the procedure of S14.2.3 as specified by this
section.
    S<IP_ADDRESS>.3 Each white conspicuity reflex reflector installed in a
vertical orientation must be designed to conform to the photometry
requirements of Table XVI-a for a white reflex reflector, and Table
XVI-b for a white horizontal conspicuity reflex reflector and a white
vertical conspicuity reflex reflector when tested according to the
procedure of S14.2.3 as specified by this section.
    S8.2.3 Conspicuity system installation on trailers.
    S<IP_ADDRESS> Trailer rear.
    S<IP_ADDRESS>.1 Element 1--alternating red and white materials. As shown
in Figure 11, a strip of sheeting or conspicuity reflex reflectors, as
horizontal as practicable, must be applied across the full width of the
trailer, as close to the extreme edges as practicable, and as close as
practicable to not less than 375 mm and not more than 1525 mm above the
road surface at the strip centerline with the trailer at curb weight.
    S<IP_ADDRESS>.2 Element 2--white. (not required for container chassis or
for platform trailers without bulkheads).
    S<IP_ADDRESS>.2.1 As shown in Figure 11, two pairs of strips of sheeting
or conspicuity reflex reflectors, each pair consisting of strips 300 mm
long of Grade DOT-C2, DOT-C3, or DOT-C4, must be applied horizontally
and vertically to the right and left upper contours of the body, as
viewed from the rear, as close to the top of the trailer and as far
apart as practicable.
    S<IP_ADDRESS>.2.2 If the perimeter of the body, as viewed from the rear,
is other than rectangular, the strips may be applied along the
perimeter, as close as practicable to the uppermost and outermost areas
of the rear of the body on the left and right sides.
    S<IP_ADDRESS>.3 Element 3--alternating red and white materials. (not
required for trailers without underride protection devices).
    S<IP_ADDRESS>.3.1 As shown in Figure 11, a strip of Grade DOT-C2
sheeting no less than 38 mm wide or reflectors must be applied across
the full width of the horizontal member of the rear underride
protection device.
    S<IP_ADDRESS> Trailer side--alternating red and white materials.
    S<IP_ADDRESS>.1 As shown in Figure 11, a strip of sheeting or
conspicuity reflex reflectors must be applied to each side, as
horizontal as practicable, originating and terminating as close to the
front and rear as practicable, as close as practicable to not less than
375 mm and not more than 1525 mm above the road surface at the strip
centerline at curb weight, except that at the location chosen the strip
must not be obscured in whole or in part by other motor vehicle
equipment or trailer cargo.
    S<IP_ADDRESS>.2 The strip need not be continuous as long as not less
than half the length of the trailer is covered and the spaces are
distributed as evenly as practicable.
    S<IP_ADDRESS>.3 If necessary to clear rivet heads or other similar
obstructions, Grade DOT-C2 sheeting may be separated into two 25 mm
wide strips of the same length and color, separated by a space of not
more than 25 mm and used in place of the retroreflective sheeting that
would otherwise be applied.
    S8.2.4 Conspicuity system installation on truck tractors.
    S<IP_ADDRESS> Element 1--alternating red and white materials. As shown
in Figure 13, two strips of sheeting or conspicuity reflex reflectors,
each not less than 600 mm long, located as close as practicable to the
edges of the rear fenders, mudflaps, or the mudflap support brackets,
must be applied to mark the width of the truck tractor.
    S<IP_ADDRESS>.1 The strips must be mounted as horizontal as practicable,
in a vertical plane facing the rear, on the rear fenders, on the
mudflap support brackets, on plates attached to the mudflap support
brackets, or on the mudflaps.
    S<IP_ADDRESS>.2 Strips on mudflaps must be mounted not lower than 300 mm
below the upper horizontal edge of the mudflap. If the vehicle is
certified with temporary mudflap support brackets, the strips must be
mounted on the mudflaps or on plates transferable to permanent mudflap
support brackets.
    S<IP_ADDRESS>.3 For a truck tractor without mudflaps, the strips may be
mounted outboard of the frame on brackets behind the rear axle or on
brackets ahead of the rear axle and above the top of the rear tires at
unladen vehicle height, or they may be mounted directly or indirectly
to the back of the cab as close to the outer edges as practicable,
above the top of the tires, and not more than 1525 mm above the road
surface at unladen vehicle height.
    S<IP_ADDRESS>.4 If the strips are mounted on the back of the cab, no
more than 25% of their cumulative area may be obscured by vehicle
equipment as determined in a rear orthogonal view.
    S<IP_ADDRESS> Element 2--white. As shown in Figure 13, two pairs of
strips of sheeting or conspicuity reflex reflectors, each pair
consisting of strips 300 mm long, must be applied horizontally and
vertically as practicable to the right and left upper contours of the
cab, as close to the top of the cab and as far apart as practicable.
    S<IP_ADDRESS>.1 No more than 25% of their cumulative area may be
obscured by vehicle equipment as determined in a rear orthogonal view.
    S<IP_ADDRESS>.2 If one pair must be relocated to avoid obscuration by
vehicle equipment, the other pair may be relocated in order to be
mounted symmetrically.
    S<IP_ADDRESS>.3 If the rear window is so large as to occupy all the
practicable space, the material may be attached to the edge of the
window itself.
    S9 Associated equipment requirements.
    S9.1 Turn signal operating unit.
    S9.1.1 The turn signal operating unit installed on passenger cars,
multipurpose passenger vehicles, trucks, and buses less than 2032 mm in
overall width must be self-canceling by steering wheel rotation and
capable of cancellation by a manually operated control.
    S9.1.2 Physical tests. Each turn signal operating unit must be
designed to conform to all applicable performance requirements of
S14.9.
    S9.2 Turn signal flasher.
    S9.2.1 The means of producing the turn signal pilot indicator
signal may be incorporated in the flasher. A means of producing an
audible signal may be incorporated in the flasher.
    S9.2.2 Physical tests. Each turn signal flasher must be designed to
conform to all applicable performance requirements of S14.9.
    S9.3 Turn signal pilot indicator.
    S9.3.1 Each vehicle equipped with a turn signal operating unit
where any turn signal lamp is not visible to the driver must also have
an illuminated pilot indicator to provide a clear and unmistakable
indication that the turn signal system is activated.
    S9.3.2 The indicator must consist of one or more lights flashing at
the same frequency as the turn signal lamps.
    S9.3.3 The indicator must function satisfactorily under all test
conditions

imposed on the turn signal flasher in S14.9.
    S9.3.4 Indicator size and color.
    S<IP_ADDRESS> If the indicator is located inside the vehicle it must
emit a green colored light and have a minimum area equivalent to a \3/
16\ in diameter circle.
    S<IP_ADDRESS> If the indicator is located outside of the vehicle it must
emit a yellow light and have a minimum projected illuminated area of
0.1 sq in.
    S9.3.5 The minimum required illuminated area of the indicator must
be visible to any tangent on the 95th eyellipse as defined in SAE
J941b, Motor Vehicle Driver's Eye Range, February 1969, (incorporated
by reference, see 571.108 S5.2 of this title) with the steering wheel
turned to a straight ahead driving position and in the design location
for an adjustable wheel or column.
    S9.3.6 Turn signal lamp failure. Failure of one or more turn signal
lamps such that the minimum photometric performance specified in Tables
VI or VII is not being met must be indicated by the turn signal pilot
indicator by a ``steady on'', ``steady off'', or by a significant
change in the flashing rate, except when a variable-load turn signal
flasher is used on a multipurpose passenger vehicle, truck, or bus 2032
mm or more in overall width, on a truck that is capable of
accommodating a slide in camper, or on any vehicle equipped to tow
trailers.
    S9.4 Headlamp beam switching device. Each vehicle must have a means
of switching between lower and upper beams designed and located so that
it may be operated conveniently by a simple movement of the driver's
hand or foot. The switch must have no dead point and, except as
provided by S<IP_ADDRESS>, the lower and upper beams must not be energized
simultaneously except momentarily for temporary signaling purposes or
during switching between beams.
    S9.4.1 Semi-automatic headlamp beam switching device. As an
alternative to S9.4, a vehicle may be equipped with a semi-automatic
means of switching between lower and upper beams.
    S<IP_ADDRESS> Operating instructions. Each semi-automatic headlamp
switching device must include operating instructions to permit a driver
to operate the device correctly including; how to turn the automatic
control on and off, how to adjust the provided sensitivity control, and
any other specific instructions applicable to the particular device.
    S<IP_ADDRESS> Manual override. The device must include a means
convenient to the driver for switching to the opposite beam from the
one provided.
    S<IP_ADDRESS> Fail safe operation. A failure of the automatic control
portion of the device must not result in the loss of manual operation
of both upper and lower beams.
    S<IP_ADDRESS> Automatic dimming indicator. There must be a convenient
means of informing the driver when the device is controlling the
headlamps automatically. The device shall not affect the function of
the upper beam indicator light.
    S<IP_ADDRESS> Lens accessibility. The device lens must be accessible for
cleaning when the device is installed on a vehicle.
    S<IP_ADDRESS> Mounting height. The center of the device lens must be
mounted no less than 24 in. above the road surface.
    S<IP_ADDRESS> Physical tests. Each semi-automatic headlamp beam
switching device must be designed to conform to all applicable
performance requirements of S14.9.
    S9.5 Upper beam headlamp indicator. Each vehicle must have a means
for indicating to the driver when the upper beams of the headlighting
system are activated.
    S9.5.1 Indicator size and location. The upper beam headlamp
indicator must have a minimum area equivalent to that of a \3/16\ in
diameter circle, and be plainly visible to drivers of all heights under
normal driving conditions when headlamps are required.
    S9.6 Vehicular hazard warning signal operating unit.
    S9.6.1 The unit may be an independent device or it may be combined
with the turn signal operating unit. If combined with the turn signal
operating unit, the actuating motion of the hazard function must differ
from the actuating motion of the turn signal function.
    S9.6.2 Operating unit switch. The unit must operate independently
of the ignition or equivalent switch. If the actuation of the hazard
function requires the operation of more than one switch, a means must
be provided for actuating all switches simultaneously by a single
driver action.
    S9.6.3 Physical tests. Each vehicular hazard warning signal
operating unit must be designed to conform to all applicable
performance requirements of S14.9.
    S9.7 Vehicular hazard warning signal flasher.
    S9.7.1 The means of producing the hazard warning signal pilot
indicator signal may be incorporated in the flasher. A means of
producing an audible signal may be incorporated in the flasher.
    S9.7.2 Physical tests. Each vehicular hazard warning signal flasher
must be designed to conform to all applicable performance requirements
of S14.9.
    S9.8 Vehicular hazard warning signal pilot indicator.
    S9.8.1 In vehicles equipped with right hand and left hand turn
signal pilot indicators, both pilot indicators and /or a separate pilot
indicator must flash simultaneously while the vehicle hazard warning
signal operating unit is turned on.
    S9.8.2 In vehicles equipped with a single turn signal pilot
indicator, a separate vehicular hazard warning signal pilot indicator
must flash and the turn signal pilot indicator may flash while the
vehicle hazard warning signal operating unit is turned on.
    S9.8.3 The indicator must function satisfactorily under all test
conditions imposed on the vehicular hazard warning signal flasher in
S14.9.
    S9.8.4 Indicator size and color. If the vehicular hazard warning
signal pilot indicator is not combined with the turn signal pilot
indicator, it must emit a red color and have a minimum area equivalent
to a 0.5 in diameter circle.
    S10 Headlighting system requirements.
    S10.1 Vehicle headlighting systems.
    S10.1.1 Each passenger car, multipurpose passenger vehicle, truck
and bus must be equipped with a headlighting system conforming to the
requirements of Table II and this standard.
    S10.1.2 Each motorcycle must be equipped with a headlighting system
conforming to S10.17 of this standard or one half of any headlighting
system of Table II which provides both a full upper beam and full lower
beam.
    S10.2 Aiming. Each headlamp system installed on a motor vehicle
must be aimable in accordance with the requirements of S10.18.
    S10.3 Number. See Tables I-a and I-c.
    S10.4 Color of light. See Tables I-a and I-c.
    S10.5 Mounting location. See Tables I-a and I-c and S<IP_ADDRESS>.
    S10.6 Mounting height. See Tables I-a and I-c.
    S10.7 Activation. See Tables I-a and I-c, Table II, and S6.1.5.
    S10.8 Effective projected luminous lens area. No requirement.
    S10.9 Visibility. No requirement.
    S10.10 Indicator. See S9.5.
    S10.11 Markings. See S6.5.
    S10.12 Spacing to other lamps. See S<IP_ADDRESS>.
    S10.13 Sealed beam headlighting systems. All sealed beam
headlighting

systems must be of a type designated in Table II-a. Each sealed beam
headlamp must be designed to conform to the specifications furnished
with respect to it pursuant to Appendix C of part 564 of this chapter
and Table II-a of this standard. The dimensions applicable to the
design of a specific type are those identified with an ``I'' for
interchangeability specified on the applicable drawing(s) filed in
Docket No. NHTSA 98-3397.
    S10.13.1 Installation. A sealed beam headlighting system must
consist of the correct number of designated headlamp units as specified
for the applicable system in Table II-a. The units must have their
beams activated as specified in Table II-a. A system must provide in
total not more than two upper beams and two lower beams.
    S10.13.2 Simultaneous aim. Type F sealed beam headlamps may be
mounted on common or parallel seating and aiming planes to permit
simultaneous aiming of both headlamps provided that there is no
provision for adjustment between the common or parallel aiming and
seating planes of the two lamps. When tested with any conforming Type
UF and LF headlamps in accordance with S14.2.5, the assembly
(consisting of the Type UF and LF headlamps, mounting rings, the
aiming/seating rings, and aim adjustment mechanism) must be designed to
conform to the applicable photometric requirements.
    S10.13.3 Photometry. Each sealed beam headlamp must be designed to
conform to the photometry requirements of Table XVIII for upper beam
and Table XIX for lower beam as specified in Table II-a for the
specific headlamp unit and aiming method, when tested according to the
procedure of S14.2.5.
    S10.13.4 Physical tests.
    S<IP_ADDRESS> Each sealed beam headlamp must be designed to conform to
the performance requirements of the corrosion test, vibration test,
inward force test, torque deflection test, headlamp connector test,
headlamp wattage test, and aiming adjustment tests of S14.6.
    S<IP_ADDRESS> Each sealed beam headlamp except a Type G or Type H must
be designed to conform to the performance requirements of the retaining
ring test of S14.6.
    S<IP_ADDRESS> Each sealed beam headlamp must be designed to conform to
the performance requirements of the color test of S14.4. Each sealed
beam headlamp that does not incorporate a glass lens must be designed
to conform to the plastic optical materials test of S14.4.
    S10.14 Integral beam headlighting systems. All integral beam
headlighting systems must be of a type designated in Table II-c.
    S10.14.1 Installation. An integral beam headlighting system must
consist of the correct number of designated headlamp units as specified
for the applicable system in Table II-c. The units must have their
beams activated as specified in Table II-c. A system must provide in
total not more than two upper beams and two lower beams.
    S10.14.2 Aimability.
    S<IP_ADDRESS> A system that incorporates any headlamp or beam
contributor that does not have a VHAD as an integral and indivisible
part of the headlamp or beam contributor must be designed so that the
applicable photometric requirements are met when any correctly aimed
and photometrically conforming headlamp or beam contributor is removed
from its mounting and aiming mechanism, and is replaced without reaim
by any conforming headlamp or beam contributor of the same type.
    S<IP_ADDRESS> A system that incorporates more than one beam
contributor providing a lower beam, and/or more than one beam
contributor providing an upper beam, shall be designed to conform to
the on-vehicle aiming requirements specified in S10.18.8.
    S10.14.3 Simultaneous aim. An integral beam headlighting system
consisting of four individual headlamps or beam contributors may have
the headlamp units mounted in an assembly to permit simultaneous aiming
of the beam(s) contributors, providing that with any complying
contributor the assembly complete with all lamps meets the applicable
photometric requirements when tested in accordance with S14.2.5.
    S10.14.4 Markings. An integral beam headlamp with a single light
source providing the lower beam must have its lens permanently marked
with ``L''. An integral beam headlamp with a single light source
providing the upper beam must have its lens permanently marked with
``U''.
    S10.14.5 Additional light sources. An integral beam headlamp may
incorporate light sources that are used for purposes other than
headlighting and are capable of being replaced.
    S10.14.6 Photometry. Each integral beam headlamp must be designed
to conform to the photometry requirements of Table XVIII for upper beam
and Table XIX for lower beam as specified in Table II-c for the
specific headlamp unit and aiming method, when tested according to the
procedure of S14.2.5.
    S10.14.7 Physical tests.
    S<IP_ADDRESS> Each integral beam headlamp must be designed to conform
to the performance requirements of the corrosion test, temperature
cycle test, vibration test, inward force test, headlamp connector test,
and aiming adjustment tests of S14.6.
    S<IP_ADDRESS> Each integral beam headlamp that is not designed to
conform to the performance requirements of the sealing test of S14.6
must be designed to conform to the performance requirements of the
connector-corrosion test, dust test, and humidity test of S14.6.
    S<IP_ADDRESS> Each integral beam headlamp except those with a glass
lens must be designed to conform to the performance requirements of the
abrasion test of S14.6.
    S<IP_ADDRESS> Each integral beam headlamp except those with a
nonreplaceable glass lens must be designed to conform to the
performance requirements of the chemical resistance test of S14.6.
    S<IP_ADDRESS> Each integral beam headlamp except those with a glass
lens and a non-plastic reflector must be designed to conform to the
performance requirements of the internal heat test of S14.6.
    S<IP_ADDRESS> Each integral beam headlamp incorporating a replaceable
lens must be designed to conform to the performance requirements of the
chemical resistance of reflectors of replaceable lens headlamps test
and the corrosion resistance of reflectors of replaceable lens
headlamps test of S14.6.
    S<IP_ADDRESS> Each integral beam headlamp capable of being
mechanically aimed by externally applied headlamp aiming devices
specified in SAE J602 OCT80, Headlamp Aiming Device for Mechanically
Aimable Sealed Beam Headlamp Units, (incorporated by reference, see
571.108 S5.2 of this title) must be designed to conform to the
performance requirements of the torque deflection test of S14.6.
    S<IP_ADDRESS> Each integral beam headlamp must be designed to conform
to the performance requirements of the color test of S14.4. Each
integral beam headlamp that does not incorporate a glass lens must be
designed to conform to the performance requirements of the plastic
optical materials test of S14.4.
    S10.15 Replaceable bulb headlighting systems. All replaceable bulb
headlighting systems must be of a type designated in Table II-d.
    S10.15.1 Installation. A replaceable bulb headlighting system must
consist of either two or four headlamps as

[[Continued on page 68283]]

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[[pp. 68283-68332]] Federal Motor Vehicle Safety Standards; Lamps, Reflective
Devices, and Associated Equipment

[[Continued from page 68282]]

specified for the applicable system in Table II-d. The headlamps must
have their beams activated as specified in Table II-d. A system must
provide in total not more than two upper beams and two lower beams and
must incorporate not more than two replaceable light sources in each
headlamp.
    S10.15.2 Aiming restrictions. Each replaceable bulb headlamp
designed to conform to the external aiming requirements of S10.18.7
must have no mechanism that allows adjustment of an individual light
source, or if there are two light sources, independent adjustments of
each reflector.
    S10.15.3 Replacement lens reflector units. Each lens reflector unit
manufactured as replacement equipment must be designed to conform to
applicable photometry requirements when any replaceable light source
designated for such a unit is inserted in it.
    S10.15.4 Markings.
    S<IP_ADDRESS> A replaceable bulb headlamp in a four headlamp system
providing lower beam must have its lens permanently marked with ``L''.
A replaceable bulb headlamp in a four headlamp system providing upper
beam must have its lens permanently marked with ``U''.
    S<IP_ADDRESS>.1 No such markings are required if the light sources in
the headlamp are any combination of dual filament light sources other
than HB2.
    S10.15.5 Additional light sources. A replaceable bulb headlamp may
incorporate replaceable light sources that are used for purposes other
than headlighting.
    S10.15.6 Photometry. Each replaceable bulb headlamp must be
designed to conform to the photometry requirements of Table XVIII for
upper beam and Table XIX for lower beam as specified in Table II-d for
the specific headlamp unit and aiming method, when tested according to
the procedure of S14.2.5 using any replaceable light source designated
for use in the system under test.
    S10.15.7 Physical tests.
    S<IP_ADDRESS> Each replaceable bulb headlamp must be designed to
conform to the performance requirements of the corrosion test,
corrosion-connector test, dust test, temperature cycle test, humidity
test, vibration test, inward force test, headlamp connector test, and
aiming adjustment tests of S14.6.
    S<IP_ADDRESS> Each replaceable bulb headlamp except those with a glass
lens must be designed to conform to the performance requirements of the
abrasion test of S14.6.
    S<IP_ADDRESS> Each replaceable bulb headlamp except those with a
nonreplaceable glass lens must be designed to conform to the
performance requirements of the chemical resistance test of S14.6.
    S<IP_ADDRESS> Each replaceable bulb headlamp except those with a glass
lens and a non-plastic reflector must be designed to conform to the
performance requirements of the internal heat test of S14.6.
    S<IP_ADDRESS> Each replaceable bulb headlamp incorporating a
replaceable lens must be designed to conform to the performance
requirements of the chemical resistance of reflectors of replaceable
lens headlamps test and the corrosion resistance of reflectors of
replaceable lens headlamps test of S14.6.
    S<IP_ADDRESS> Each replaceable bulb headlamp capable of being
mechanically aimed by externally applied headlamp aiming devices
specified in SAE J602 OCT80, Headlamp Aiming Device for Mechanically
Aimable Sealed Beam Headlamp Units, (incorporated by reference, see
571.108 S5.2 of this title) must be designed to conform to the
performance requirements of the torque deflection test of S14.6.
    S<IP_ADDRESS> Each replaceable bulb headlamp must be designed to
conform to the performance requirements of the color test of S14.4.
Each replaceable bulb headlamp that does not incorporate a glass lens
must be designed to conform to the performance requirements of the
plastic optical materials test of S14.4.
    S10.16 Combination headlighting systems. All combination
headlighting systems must be of a type designated in Table II-b.
    S10.16.1 Installation. A combination headlighting system must
consist of the correct number of designated headlamp units as specified
for the applicable system in Table II-b. The units must have their
beams activated as specified in Table II-b. A system must provide in
total not more than two upper beams and two lower beams. When installed
on a motor vehicle, the headlamps (or parts thereof) that provide the
lower beam must be of the same type, and provide a symmetrical
effective projected luminous lens area when illuminated.
    S10.16.2 Photometry. Each combination headlamp must be designed to
conform to the photometry requirements of Table XVIII for upper beam
and Table XIX for lower beam as specified in Table II-b for the
specific headlamp unit and aiming method, when tested according to the
procedure of S14.2.5.
    S10.16.3 Physical tests.
    S<IP_ADDRESS> Any component headlamp of a combination headlighting
system that is a Type F sealed beam headlamp must be designed to
conform to the performance requirements of S10.13.4.
    S<IP_ADDRESS> Any component headlamp of a combination headlighting
system that is an integral beam headlamp must be designed to conform to
the performance requirements of S10.14.7.
    S<IP_ADDRESS> Any component headlamp of a combination headlighting
system that is a replaceable bulb headlamp must be designed to conform
to the performance requirements of S10.15.7.
    S10.17 Motorcycle headlighting systems. A motorcycle headlighting
system may consist of:
    (a) One half of any headlighting system of Table II which provides
both a full upper beam and full lower beam, and is designed to conform
to the requirements for that headlamp type. Where more than one lamp
must be used, the lamps shall be mounted vertically, with the lower
beam as high as practicable, or
    (b) A headlighting system designed to conform to the requirements
of paragraphs S10.17.1 through S10.17.5.
    S10.17.1 Installation. The headlighting system installed on a
motorcycle must consist of one of the system types specified in this
paragraph, and must be located on the front.
    S<IP_ADDRESS> Single headlamp.
    S<IP_ADDRESS>.1 If the system consists of a single headlamp, it must
be mounted on the vertical centerline of the motorcycle.
    S<IP_ADDRESS>.2 If the headlamp contains more than one light source,
each light source must be mounted on the vertical centerline with the
upper beam no higher than the lower beam, or horizontally disposed
about the vertical centerline and mounted at the same height.
    S<IP_ADDRESS>.3 If the light sources are horizontally disposed about
the vertical centerline, the distance between the closest edges of the
effective projected luminous lens area in front of the light sources
must not be greater than 200 mm.
    S<IP_ADDRESS> Two headlamps with both beams.
    S<IP_ADDRESS>.1 If the system consists of two headlamps, each of which
provides both an upper and lower beam, the headlamps must be mounted
either at the same height and symmetrically

disposed about the vertical centerline or mounted on the vertical
centerline.
    S<IP_ADDRESS>.2 If the headlamps are horizontally disposed about the
vertical centerline, the distance between the closest edges of their
effective projected luminous lens areas must not be greater than 200
mm.
    S<IP_ADDRESS> Two headlamps, upper beam and lower beam.
    S<IP_ADDRESS>.1 If the system consists of two headlamps, one of which
provides an upper beam and one of which provides the lower beam, the
headlamps must be located on the vertical centerline with the upper
beam no higher than the lower beam, or horizontally disposed about the
vertical centerline and mounted at the same height.
    S<IP_ADDRESS>.2 If the headlamps are horizontally disposed about the
vertical centerline, the distance between the closest edges of their
effective projected luminous lens areas must not be greater than 200
mm.
    S10.17.2 Motorcycle replaceable bulb headlamp marking. Each
replaceable bulb headlamp that is designed to conform to S10.17(b) and
that is equipped with a light source other than a replaceable light
source meeting the requirements of S11, must have the word
``motorcycle'' permanently marked on the lens in characters not less
than 3 mm in height.
    S10.17.3 Photometry. Each motorcycle headlamp that is not designed
to conform to S10.17(a), must be designed to conform to the photometry
requirements of Table XX when tested according to the procedure of
S14.2.5.
    S10.17.4 Physical tests. Each motorcycle headlamp that is not
designed to conform to S10.17(a) must be designed to conform to the
performance requirements of the vibration test, moisture test, dust
test, and corrosion test of S14.5, the out of focus test of S14.3, the
color test of S14.4, and each motorcycle headlamp that does not
incorporate a glass lens must be designed to conform to the performance
requirements of the plastic optical materials test of S14.4.
    S10.17.5 Motorcycle headlamp modulation system. A headlamp on a
motorcycle may be activated to modulate either the upper beam or the
lower beam from its maximum intensity to a lesser intensity, provided
that:
    S<IP_ADDRESS> Modulation.
    (a) The rate of modulation must be 240  40 cycles per
minute.
    (b) The headlamp must be operated at maximum power for 50 to 70
percent of each cycle.
    (c) The lowest intensity at any test point must be not less than 17
percent of the maximum intensity measured at the same point.
    (d) The modulator switch must be wired in the power lead of the
beam filament being modulated and not in the ground side of the
circuit.
    (e) Means must be provided so that both the lower beam and upper
beam remain operable in the event of a modulator failure.
    (f) The system must include a sensor mounted with the axis of its
sensing element perpendicular to a horizontal plane. Headlamp
modulation must cease whenever the level of light emitted by a tungsten
filament light operating at 3000[deg] Kelvin is either less than 270
lux of direct light for upward pointing sensors or less than 60 lux of
reflected light for downward pointing sensors. The light is measured by
a silicon cell type light meter that is located at the sensor and
pointing in the same direction as the sensor. A Kodak Gray Card (Kodak
R-27) is placed at ground level to simulate the road surface in testing
downward pointing sensors.
    (g) When tested in accordance with the test profile shown in Figure
9, the voltage drop across the modulator when the lamp is on at all
test conditions for 12 volt systems and 6 volt systems must not be
greater than 0.45 volt. The modulator must meet all the provisions of
the standard after completion of the test profile shown in Figure 9.
    (h) Means must be provided so that both the lower and upper beam
function at design voltage when the headlamp control switch is in
either the lower or upper beam position when the modulator is off.
    S<IP_ADDRESS> Replacement modulators. Each modulator not intended as
original equipment, or its container, must be labeled with the maximum
wattage, and the minimum wattage appropriate for its use.
    S<IP_ADDRESS>.1 Replacement performance. Each modulator, not intended
as original equipment, must comply with S<IP_ADDRESS> (a) through (g) when
connected to a headlamp of the maximum rated power and a headlamp of
the minimum rated power, and must provide means so that the modulated
beam functions at design voltage when the modulator is off.
    S<IP_ADDRESS>.2 Replacement instructions. Instructions, with a
diagram, must be provided for mounting the light sensor including
location on the motorcycle, distance above the road surface, and
orientation with respect to the light.
    S10.18 Headlamp aimability performance requirements.
    S10.18.1 Headlamp mounting and aiming. Except as provided in this
paragraph, each headlamp must be installed on a motor vehicle with a
mounting and aiming mechanism that permits aim inspection and
adjustment of both vertical and horizontal aim, and is accessible for
those purposes without removal of any vehicle parts, except for
protective covers removable without the use of tools.
    S<IP_ADDRESS> The axis of the light beams must be adjustable to the
left, right, up, or down from the designed setting, the amount of
adjustability to be determined by practical operating conditions and
the type of equipment.
    S<IP_ADDRESS> The adjustments must be conveniently made by one person
with tools ordinarily available. When the headlamps are secured, the
aim will not be disturbed under ordinary conditions of service.
    S10.18.2 Headlamp aiming systems. When a headlamp system is
installed on a motor vehicle, it must be aimable with at least one of
the following: An externally applied aiming device, as specified in
S10.18.7; an on-vehicle headlamp aiming device installed by the vehicle
or lamp manufacturer, as specified in S10.18.8; or by visual/optical
means, as specified in S10.18.9.
    S10.18.3 Aim adjustment interaction. When installed on the vehicle,
adjustment of one aim axis through its full on-vehicle range must not
cause the aim of the other axis to deviate more than
0.76[deg]. If the performance specified is not achievable, the
requirements of S<IP_ADDRESS> apply, except that if the aiming mechanism
is not a VHAD, the requirements specific to VHADs are not applicable,
and the instruction must be specific to the aiming mechanism installed.
    S<IP_ADDRESS> Should the mechanism not meet the requirements of
S10.18.3, a cautionary label must be placed adjacent to the mechanism
stating the caution and including either the reason for the caution or
the corrective action necessary. Each such label must also refer the
reader to the vehicle operator's manual for complete instructions. Each
such vehicle must be equipped with an operator's manual containing the
complete instructions appropriate for the mechanism installed.
    S10.18.4 Horizontal adjustment-visually aimed headlamp. A visually/
optically aimable headlamp that has a lower beam must not have a
horizontal adjustment mechanism unless such mechanism meets the
requirements of this standard for on vehicle aiming as specified in
S10.18.8.

    S10.18.5 Optical axis marking.
    S<IP_ADDRESS> Optical axis marking-vehicle. Each motor vehicle must be
equipped with headlamps or beam contributors which have a mark or
markings that are visible from the front of the headlamp when installed
on the vehicle to identify the optical axis of the headlamp to assure
proper horizontal and vertical alignment of the aiming screen or
optical aiming equipment. The manufacturer is free to choose the design
of the mark or markings. The mark or markings may be on the interior or
exterior of the lens or indicated by a mark or central structure on the
interior or exterior of the headlamp.
    S<IP_ADDRESS> Optical axis marking-lamp. Each headlamp or beam
contributor that is not visually/optically aimable in accordance with
S10.18.9 of this standard must be equipped with fiducial marks, aiming
pads, or similar references of sufficient detail and accuracy, for
determination of an appropriate vehicle plane to be used with the
photometric procedures of S14.2.5 for correct alignment with the
photometer axis when being tested for photometric compliance, and to
serve for the aiming reference when the headlamp or beam contributor is
installed on a motor vehicle. The fiducial marks, aiming pads, or
similar references are protrusions, bubble vials, holes, indentations,
ridges, scribed lines, or other readily identifiable marks established
and described by the vehicle or headlamp manufacturer.