Pub. L. 91-194, tit. I, sec. 119

Sec. 119. The President is directed to withhold economic assistance in an amount equivalent to the amount spent by any underdeveloped country for the purchase of sophisticated weapons systems, such as missile systems and jet aircraft for military purposes from any country other than Greece, Turkey, the Republic of China, the Philippines, and Korea, unless the President determines that such purchase or acquisition of weapons systems is important to the national security of the United States and reports within thirty days each such determination to the Congress.