(a) Initial investigation. The Administrator may initiate an investigation under this part either as the result of a complaint or at any time on the Administrator's own initiative. The Administrator may investigate potential violations of, and obtain compliance with, the Executive Order. As part of the investigation, the Administrator may conduct interviews with the predecessor and successor contractors, as well as confidential interviews with the relevant contractors' workers at the worksite during normal work hours; inspect the relevant contractors' records; make copies and transcriptions of such records; and require the production of any documents or other evidence deemed necessary to determine whether a violation of this part, including conduct warranting imposition of debarment pursuant to § 9.23(d), has occurred. Federal agencies and contractors must cooperate with any authorized representative of the Department of Labor in the inspection of records, in interviews with workers, and in all aspects of investigations.

(b) Subsequent investigations. The Administrator may conduct a new investigation or issue a new determination if the Administrator concludes circumstances warrant, such as where the proceedings before an Administrative Law Judge reveal that there may have been violations with respect to other employees of the contractor, where imposition of debarment is appropriate, or where the contractor has failed to comply with an order of the Secretary.