46 U.S.C. § 58102

The Secretary of Transportation may supervise the number and compensation of all officers and employees of a contractor under the operating-differential subsidy program or a charterer under chapter 575 of this title, receiving an operating-differential subsidy, if the contractor or charterer— (1) is in default on a mortgage, note, purchase contract, or other obligation to the Secretary; or (2) has not maintained, in a manner satisfactory to the Secretary, all of the reserves provided for in this subtitle.