29 CFR 417.17: Investigation of complaint and court action.

The Office of Labor-Management Standards shall investigate such complaint, and if upon such investigation the Secretary finds probable cause to believe that a violation of section 401(h) of the Act has occurred and has not been remedied, the Secretary shall within 60 days after the filing of such complaint, bring a civil action against the labor organization in the district court of the United States for the district in which such labor organization maintains its principal office, to direct the conduct of a hearing and vote upon the removal of officer(s) under the supervision of the Director as provided in section 402(b) of the Act.