Date of approval of this Act or any amendment thereto, referred to in text, means Sept. 12, 1964, date of enactment of Pub. L. 88–590, originally classified to sections 271 to 271d of this title, and Nov. 12, 1971, date of approval of Pub. L. 92–154, amendatory of Pub. L. 88–590 and classified to sections 271 to 271b, 271e to 271g of this title.

1971—Pub. L. 92–154 inserted “or any amendment thereto” after “date of approval of this Act”.