506. Amounts appropriated in prior Acts under the heading Multilateral Assistance—International Financial Institutions—Contributions to the International Monetary Fund Facilities and Trust Funds shall be available to cover the cost, as defined in section 502 of the Congressional Budget Act of 1974 ( 2 U.S.C. 661a ), of loans made by the Secretary of the Treasury to the Poverty Reduction and Growth Trust (PRGT) or to the Resilience and Sustainability Trust (RST) of the IMF: Provided , That these funds shall be available to subsidize gross obligations for the principal amount of direct loans not to exceed $21,000,000,000 in the aggregate, and the Secretary of the Treasury is authorized to make such loans. 507. Funds appropriated in this Act and prior Acts making appropriations for the Department of State, foreign operations, and related programs may be reprogrammed for assistance for Ukraine without regard to any minimum amounts specifically designated in such Acts. 508. During fiscal year 2024, section 614 of the Foreign Assistance Act of 1961 ( 22 U.S.C. 2364 ) shall be applied— (1) in subsection (a)(4)(A)(ii), by substituting $500,000,000 for $250,000,000