29 CFR § 1979.108 - Role of Federal agencies.
(1) The complainant and the named person shall be parties in every proceeding. At the Assistant Secretary's discretion, the Assistant Secretary may participate as a party or may participate as amicus curiae at any time in the proceedings. This right to participate shall include, but is not limited to, the right to petition for review of a decision of an administrative law judge, including a decision based on a settlement agreement between complainant and the named person, to dismiss a complaint or to issue an order encompassing the terms of the settlement.
(2) Copies of pleadings in all cases, whether or not the Assistant Secretary is participating in the proceeding, must be sent to the Assistant Secretary, Occupational Safety and Health Administration, and to the Associate Solicitor, Division of Fair Labor Standards, U.S. Department of Labor, Washington, DC 20210.
(b) The FAA may participate as amicus curiae at any time in the proceedings, at the FAA's discretion. At the request of the FAA, copies of all pleadings in a case must be sent to the FAA, whether or not the FAA is participating in the proceeding.