Pub. L. 88-258, tit. I, sec. 111

Sec. 111. None of the funds appropriated or made available under this Act for carrying out the Foreign Assistance Act of 1961, as amended, may be used to make payments with respect to any contract for the performance of services outside the United States by United States citizens where such citizens have not been investigated for loyalty and security in the same manner and to the same extent as would apply if they were regularly employed by the United States.