; and (ii) costs (including expert witness fees) reasonably incurred, as determined by the Secretary, administrative law judge, review board, or court, respectively, in connection with bringing the complaint upon which the order was issued. (15) Procedural Rights The rights and remedies provided for in this subsection may not be waived by any agreement, policy, form, or condition of employment, including by any pre-dispute arbitration agreement or collective bargaining agreement. (16) Savings Nothing in this subsection shall be construed to diminish the rights, privileges, or remedies of any employee who exercises rights under any Federal or State law or common law, or under any collective bargaining agreement. (17) Election of venue (A) In general An employee of an employer who is located in a State that has a State plan approved under section 18 may file a complaint alleging a violation of paragraph (1) or (2) by such employer with— (i) the Secretary under paragraph (5) ; or (ii) a State plan administrator in such State. (B) Referrals If— (i) the Secretary receives a complaint pursuant to subparagraph (A)(i), the Secretary shall not refer such complaint to a State plan administrator for resolution