Pub. L. 87-879, tit. VI, sec. 601

Sec. 601. Within the unit limit of cost fixed by law, appropriations and authorizations made for the Department under this Act shall lie available for the purchase, in addition to those specifically provided for, of not to exceed four hundred and seventy-six passenger motor vehicles, of which four hundred and forty-three shall be for replacement only, and for the hire of such vehicles.