Appropriations in this title ¹ or appropriations made under this title ¹ in subsequent Energy and Water Development Appropriations Acts shall on and after October 2, 1992, be available for hire, maintenance, and operation of aircraft; hire of passenger motor vehicles; purchases of reprints; payment for telephone services 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 memberships in societies or associations which issue publications to members only or at a price to members lower than to subscribers who are not members.