A person may not seek to have an H-2B worker, a worker in corresponding employment, or any other person, including but not limited to a U.S. worker improperly rejected for employment or improperly laid off or displaced, waive or modify any rights conferred under 8 U.S.C. 1184(c), INA section 214(c), 20 CFR part 655, subpart A, or the regulations in this part. Any agreement by an employee purporting to waive or modify any rights given to said person under these provisions will be void as contrary to public policy except as follows:
(a) Waivers or modifications of rights or obligations hereunder in favor of the Secretary will be valid for purposes of enforcement; and
(b) Agreements in settlement of private litigation are permitted.