The United States Governor is hereby authorized to agree on behalf of the United States to contribute to the Association three annual installments of $320,000,000 each as recommended in the “Report of the Executive Directors to the Board of Governors on Additions to IDA Resources: Third Replenishment,” dated July 21, 1970. There is hereby authorized to be appropriated, without fiscal year limitation, the amounts necessary for payment by the Secretary of the Treasury of three annual installments of $320,000,000 each for the United States share of the increase in the resources of the Association.