Pub. L. 94-330, tit. IV, sec. 506

Sec. 506. Beginning three months from the date of enactment of this Act, no part, of any appropriation contained in this Act shall be used to furnish assistance to any country which is in default during a period in excess of one calendar year in payment to the United States of principal or interest on any loan made to such country by the United States pursuant to a program for which funds are appropriated under this Act unless (1) such debt has been disputed by such country prior to the enactment of this Act or (2) such country has either arranged to make payment of the amount in arrears or otherwise taken appropriate steps, which may include renegotiation, to cure the existing default.