(a) Whenever the Secretary believes that the provisions of the Act or these regulations have been violated, such action shall be taken and such proceedings instituted as deemed appropriate, including the following:

(1) Petitioning any appropriate District Court of the United States for temporary or permanent injunctive relief to restrain violation of the provisions of the Act or this part by any person, and to require compliance with the Act and this part, including such legal or equitable relief incident thereto as may be appropriate, including, but not limited to, employment, reinstatement, promotion, and the payment of lost wages and benefits;

(2) Assessing a civil penalty against any employer who violates any provision of the Act or this part in an amount of not more than $10,000 for each violation, in accordance with regulations set forth in this part; or

(3) Referring any unpaid civil money penalty which has become a final and unappealable order of the Secretary or a final judgment of a court in favor of the Secretary to the Attorney General for recovery.

(b)(1) Any employer who violates this Act shall be liable to the employee or prospective employee affected by such violation for such legal or equitable relief as may be appropriate, including, but not limited to, employment, reinstatement, promotion, and the payment of lost wages and benefits.

(2) An action under this subsection may be maintained against the employer in any Federal or State court of competent jurisdiction by an employee or prospective employee for or on behalf of such employee, prospective employee and others similarly situated. Such action must be commenced within a period not to exceed 3 years after the date of the alleged violation. The court, in its discretion, may allow reasonable costs (including attorney's fees) to the prevailing party.

(c) The taking of any one of the actions referred to in paragraph (a) of this section shall not be a bar to the concurrent taking of any other appropriate action.