41 C.F.R. § 301-76.1
Collection of undisputed delinquent amounts that an employee (including members of the uniformed services) owes to the Government travel charge card contractor
Agencies, upon written request from the contractor and in accordance with the procedures specified in § 301-76.100, may collect undisputed amounts owed to a Government travel charge card contractor from the delinquent employee's disposable pay. The agency must promptly forward all amounts deducted to the contractor.