45 CFR 86.54 - Compensation.
A recipient shall not make or enforce any policy or practice which, on the basis of sex:
(b) Results in the payment of wages to employees of one sex at a rate less than that paid to employees of the opposite sex for equal work on jobs the performance of which requires equal skill, effort, and responsibility, and which are performed under similar working conditions.
Title 45 published on 2014-10-01
no entries appear in the Federal Register after this date.