Additional subcategories based on national origin or primary language spoken may be used where appropriate on either a national or a regional basis. Paragraphs (j) (1) through (5), inclusive, set forth in this section are in conformity with Directive No. 15 of the Office of Federal Statistical Policy and Standards. To the extent that these designations are modified, paragraphs (j) (1) through (5), inclusive, set forth in this section are to be interpreted to conform with those modifications.
10 C.F.R. §1040.3