What is the precise number of black racial groups of Africa?
<p><a href="https://www.gpo.gov/fdsys/pkg/FR-1997-10-30/html/97-28653.htm" rel="nofollow noreferrer">Revisions to the Standards for the Classification of Federal Data on 
Race and Ethnicity; Notices Federal Register / Vol. 62, No. 210 / Thursday, October 30, 1997 / 
Notices</a>, Page 58789 at </p>

<blockquote>
  <ol>
  <li>Categories and Definitions</li>
  </ol>
</blockquote>

<p>defines </p>

<blockquote>
  <p>Black or African American.</p>
</blockquote>

<p>as </p>

<blockquote>
  <p>A person having origins in any of the black racial groups of Africa.</p>
</blockquote>

<p>and</p>

<blockquote>
  <p>White.</p>
</blockquote>

<p>as</p>

<blockquote>
  <p>A person having origins in any of the original peoples of Europe, the
  Middle East, or North Africa.</p>
</blockquote>

<p>Questions:</p>

<ol>
<li><p>What is the precise number of "black racial groups of Africa"?</p></li>
<li><p>Does the omission of the term "racial groups of" from the definition of "White" imply that<br/>
a) "White" is a single "racial group";<br/>
b) "White" is not a "racial group";<br/>
c) the term "racial groups" is inapplicable in whole or part as to the definition of "White"?</p></li>
<li><p>What is the legal distinction between the terms "racial groups of" that is used when defining "Black or African American" and "original peoples of" that is used when defining "White"?</p></li>
</ol>

united-states legal-terms statutory-construction