29 C.F.R. § 35.33 – Investigations.

(a) Initial investigation. CRC will investigate complaints that are unresolved after mediation or reopened because the mediation agreement has been violated.
1. (1) As part of the initial investigation, CRC will use informal fact-finding methods, including joint or separate discussions with the complainant and recipient to establish the facts and, if possible, resolve the complaint to the mutual satisfaction of the parties. CRC may seek the assistance of any involved State, local, or other Federal agency.
2. (2) Where agreement between the parties has been reached pursuant to paragraph (a)(1) of this section, the agreement shall be put in writing by DOL, and signed by the parties and an authorized official of DOL.
(b) Formal findings, conciliation, and hearing. If CRC cannot resolve the complaint during the early stages of the investigation, CRC will complete the investigation of the complaint and make formal findings. If the investigation indicates a violation of the Act or this part, CRC will attempt to achieve voluntary compliance. If CRC cannot obtain voluntary compliance, CRC will begin appropriate enforcement action, as provided in § 35.36.