29 U.S.C. § 1856
Agreements by employees purporting to waive or to modify their rights under this chapter shall be void as contrary to public policy, except that a waiver or modification of rights in favor of the Secretary shall be valid for purposes of enforcement of this chapter.
(Pub. L. 97–470, title V, § 506, , 96 Stat. 2598.)
Section effective 90 days from , see section 524 of Pub. L. 97–470, set out as a note under section 1801 of this title.