45 C.F.R. § 86.53
(b) Recruitment patterns. A recipient shall not recruit primarily or exclusively at entities which furnish as applicants only or predominantly members of one sex if such actions have the effect of discriminating on the basis of sex in violation of this subpart.
(Secs. 901, 902, Education Amendments of 1972, 86 Stat. 373, 374; 20 U.S.C. 1681, 1682)