25 U.S.C. § 1544: Additional compensation to contractors of Federal agency

Notwithstanding any other provision of law, a contractor of a Federal agency under any Act of Congress may be allowed an additional amount of compensation equal to 5 percent of the amount paid, or to be paid, to a subcontractor or supplier, in carrying out the contract if such subcontractor or supplier is an Indian organization or Indian-owned economic enterprise as defined in this chapter.