45 C.F.R. § 86.55
A recipient shall not:
(c) Maintain or establish separate lines of progression, seniority systems, career ladders, or tenure systems for similar jobs, position descriptions, or job requirements which classify persons on the basis of sex, unless sex is a bona-fide occupational qualification for the positions in question as set forth in § 86.61.
(Secs. 901, 902, Education Amendments of 1972, 86 Stat. 373, 374; 20 U.S.C. 1681, 1682)
[40 FR 24128, June 4, 1975; 40 FR 39506, Aug. 28, 1975]