Code of Federal Regulations Title 29. Labor § 29.10.27 Anti-kickback

All wages paid to workers performing on or in connection with covered contracts must be paid free and clear and without subsequent deduction (except as set forth in § 10.23), rebate, or kickback on any account. Kickbacks directly or indirectly to the employer or to another person for the employer's benefit for the whole or part of the wage are prohibited.