This means the operator must wear the seat belt; not wearing it may defeat the primary purpose of the ROPS.
Not wearing the seat belt may defeat the primary purpose of the ROPS. This means the operator must wear the seat belt.
This means the operator must wear the seat belt. Not wearing the seat belt may defeat the primary purpose of the ROPS.
This means the operator must wear the seat belt. Not wearing the seat belt may defeat the primary purpose of the ROPS.