Code of Federal Regulations Title 29. Labor § 2700.4.Parties, intervenors, and amici curiae

(a) Party status. A person, including the Secretary or an operator, who is named as a party or who is permitted to intervene, is a party. In a proceeding instituted by the Secretary under section 105(c)(2) of the Act, 30 U.S.C. 815(c)(2), the complainant on whose behalf the Secretary has filed the complaint is a party and may present additional evidence on his own behalf. A miner, applicant for employment, or representative of a miner who has filed a complaint with the Commission under section 105(c)(3) or 111 of the Act, 30 U.S.C. 815(c)(3) and 821, and an affected miner or his representative who has become a party in accordance with paragraph (b) of this section, are parties.

(b) Intervention—

(c) Procedure for participation as amicus curiae. Any person may move to participate as amicus curiae in a proceeding before a Judge. Such participation as amicus curiae shall not be a matter of right but of the sound discretion of the Judge. A motion for participation as amicus curiae shall set forth the interest of the movant and show that the granting of the motion will not unduly delay or prejudice the adjudication of the issues. If the Judge permits amicus curiae participation, the Judge's order shall specify the time within which such amicus curiae memorandum, brief, or other pleading must be filed and the time within which a reply may be made. The movant may conditionally attach its memorandum, brief, or other pleading to its motion for participation as amicus curiae.