Pub. L. 90-28, tit. I, sec. 104

Sec. 104. Appropriations made to the Department of the Interior in this title or in the Public Works Appropriations Act, 1968, shall be available for services as authorized by 5 U.S.C. 3109, when authorized by the Secretary, in total amount not to exceed $300,000; hire, maintenance and operation of aircraft; hire of passenger motor vehicles; purchase of reprints: payment for telephone service in private residences in the field, when authorized under regulations approved by the Secretary; and the payment of dues, when authorized by the Secretary, for library membership in societies or associations which issue publications to members only or at a price to members lower than to subscribers who are not members.