September 30, 2022: Provided , That up to $80,000,000 of amounts paid to this account from CCA or transferred to this account pursuant to section 1434(j) of the BUILD Act of 2018 (division F of Public Law 115–254 ) shall be available for the costs of direct and guaranteed loans provided by the United States International Development Finance Corporation pursuant to section 1421(b) of such Act: Provided further , That such costs, including the cost of modifying such loans, shall be as defined in section 502 of the Congressional Budget Act of 1974: Provided further , That such amounts obligated in a fiscal year shall remain available for disbursement for the following 8 fiscal years: Provided further , That funds transferred to carry out the Foreign Assistance Act of 1961 pursuant to section 1434(j) of the BUILD Act of 2018 may remain available for obligation for 1 additional year: Provided further , That the total loan principal or guaranteed principal amount shall not exceed $8,000,000,000. Trade and development agency For necessary expenses to carry out the provisions of section 661 of the Foreign Assistance Act of 1961 ( 22 U.S.C. 2421 ), $79,500,000, to remain available until September 30, 2021: Provided , That of the funds appropriated under this heading, up to $5,000 may be available for representation and entertainment expenses. VII General Provisions ALLOWANCES AND DIFFERENTIALS 7001. Funds appropriated under title I of this Act shall be available, except as otherwise provided, for allowances and differentials as authorized by sub chapter 59 of title 5, United States Code