; (II) the interest on the amount described in subclause (I) calculated at the prevailing rate; and (III) an additional amount as liquidated damages equal to the sum of the amount described in subclause (I) and the interest described in subclause (II), except that if a person who has violated paragraph (1) proves to the satisfaction of the court that the act or omission which violated paragraph (1) was in good faith and that the person had reasonable grounds for believing that the act or omission was not a violation of paragraph (1), such court may, in the discretion of the court, reduce the amount of the liability to the amount and interest determined under subclauses (I) and (II), respectively; and (ii) for such equitable relief as may be appropriate, including employment, reinstatement, and promotion. (B) Right of action An action to recover the damages or equitable relief prescribed in subparagraph (A) may be maintained against any person in any Federal or State court of competent jurisdiction by any individual for and on behalf of— (i) the individual; or (ii) the individual and other individuals similarly situated. (C) Fees and costs The court in such an action shall, in addition to any judgment awarded to the plaintiff, allow a reasonable attorney's fee, reasonable expert witness fees, and other costs of the action to be paid by the defendant. (D) Limitations The right provided by subparagraph (B) to bring an action by or on behalf of any individual shall terminate— (i) on the filing of a complaint by the Commissioner in an action under paragraph (5) in which restraint is sought of any further delay in the payment of the amount described in subparagraph (A)(I) to such individual by the person responsible under subparagraph (A) for the payment