$500,000 of the funds appropriated or made available in this Act shall be used during a single fiscal year for any single relocation of an organization, unit, activity or function of the Department of Defense into or within the National Capital Region: Provided , That the Secretary of Defense may waive this restriction on a case-by-case basis by certifying in writing to the congressional defense committees that such a relocation is required in the best interest of the Government. 8019. Of the funds made available in this Act, up to $15,000,000 may be available for incentive payments authorized by section 504 of the Indian Financing Act of 1974 ( 25 U.S.C. 1544 ): Provided , That a prime contractor or a subcontractor at any tier that makes a subcontract award to any subcontractor or supplier as defined in section 1544 of title 25, United States Code, or a small business owned and controlled by an individual or individuals defined under section 4221(9) of title 25, United States Code, shall be considered a contractor for the purposes of being allowed additional compensation under section 504 of the Indian Financing Act of 1974 ( 25 U.S.C. 1544 ) whenever the prime contract or subcontract amount is over $500,000 and involves the expenditure of funds appropriated by an Act making appropriations for the Department of Defense with respect to any fiscal year: Provided further , That notwithstanding section 1906 of title 41, United States Code, this section shall be applicable to any Department of Defense acquisition of supplies or services, including any contract and any subcontract at any tier for acquisition of commercial items produced or manufactured, in whole or in part, by any subcontractor or supplier defined in section 1544 of title 25, United States Code, or a small business owned and controlled by an individual or individuals defined under section 4221(9) of title 25, United States Code. 8020. Funds appropriated by this Act for the Defense Media Activity shall not be used for any national or international