Pub. L. 90-500, tit. IV, sec. 404

Sec. 404. No funds authorized for appropriation for the use of the Armed Forces of the United States under the provisions of this Act, or the provisions of any other law shall be available for the purchase, lease, rental, or other acquisition of multipassenger motor vehicles (buses) other than multipassenger motor vehicles (buses) manufactured in the United States, except as may be authorized by regulations promulgated by the Secretary of Defense solely to insure that compliance with this prohibition will not result in either an uneconomical procurement action or one which would adversely affect the national interests of the United States.