date, not after July 1, 1955, as may be agreed to by the Secretary of State.
(3) All sums advanced hereunder will be receipted for on behalf of the United Nations by the Secretary-General or other duly authorized officer of the United Nations.
Repayments without interest.(4) The United Nations will repay, without interest, to the United States the principal amount of all sums advanced hereunder, in annual payments beginning on July 1, 1951, and on the dates and in the amounts indicated, until the entire amount advanced under this agreement has been repaid as follows:
| Date | Amount | Date | Amount |
| July 1, 1951 | $1,000,000 | July 1, 1967 | $2,500,000 |
| July 1, 1952 | 1,000,000 | July 1, 1968 | 2,500,000 |
| July 1, 1953 | 1,500,000 | July 1, 1969 | 2,500,000 |
| July 1, 1954 | 1,500,000 | July 1, 1970 | 2,500,000 |
| July 1, 1955 | 2,000,000 | July 1, 1971 | 2,500,000 |
| July 1, 1956 | 2,000,000 | July 1, 1972 | 2,500,000 |
| July 1, 1957 | 2,000,000 | July 1, 1973 | 2,500,000 |
| July 1, 1958 | 2,000,000 | July 1, 1974 | 2,500,000 |
| July 1, 1959 | 2,000,000 | July 1, 1975 | 2,500,000 |
| July 1, 1960 | 2,500,000 | July 1, 1976 | 1,500,000 |
| July 1, 1961 | 2,500,000 | July 1, 1977 | 1,500,000 |
| July 1, 1962 | 2,500,000 | July 1, 1978 | 1,500,000 |
| July 1, 1963 | 2,500,000 | July 1, 1979 | 1,500,000 |
| July 1, 1964 | 2,500,000 | July 1, 1980 | 1,500,000 |
| July 1, 1965 | 2,500,000 | July 1, 1981 | 1,500,000 |
| July 1, 1966 | 2,500,000 | July 1, 1982 | 1,000,000 |
However, in the event the United Nations does not request the entire sum of $65,000,000 available to it under this Agreement, the amount to be repaid under this paragraph will not exceed the aggregate amount advanced by the United States. All amounts payable to the United States under this paragraph will be paid, out of the ordinary budget of the United Nations, to the Secretary of State of the United States in currency of the United States which is legal tender for public debts on the date such payments are made. All sums repaid to the United States will be receipted for on behalf of the United States by the Secretary of State.
(5) The United Nations may at any time make repayments to the United States of funds advanced hereunder in excess of the annual installments as provided in paragraph (4) hereof.Supra.
(6) The United Nations agrees that, in order to give full effect to Section 22 (a) of the Agreement61 Stat. 764 regarding the Headquarters of the United Nations referred to in paragraph (1) above (under which the United Nations shall not dispose of all or any part of the land owned Disposal of land. by it in the headquarters district without the consent of the United States), it will not, without the consent of the United States, while Mortgage against real property any of the indebtedness incurred hereunder is outstanding and unpaid create any mortgage, lien or other encumbrance on or against any of its real property in the headquarters district as defined in said Agreement. The United Nations also agrees that the United States, as a condition to giving its consent to any such disposition or encumbrance, may require the simultaneous repayment of the balance of all installments remaining unpaid hereunder.
Effective date of Agreement.(7) The effective date of this Agreement shall be the date on which the Government of the United States notifies the United Nations that the Congress of the United States, with the approval of the President, has made available the funds necessary to be advanced in accordance with the provisions of this Agreement.
