((a)) The United States Governor is hereby authorized to agree on behalf of the United States to pay to the Association $2,250,000,000 as the United States contribution to the seventh replenishment of the resources of the Association, except that any commitment to make such contributions shall be made subject to obtaining the necessary appropriations.

((b)) In order to pay for the United States contribution provided for in subsection (a), there are authorized to be appropriated, without fiscal year limitation, $2,250,000,000 for payment by the Secretary of the Treasury.