There are authorized to be appropriated such sums as may be necessary to carry out the provisions of sections 698 to 698e of this title, but not to exceed $63,812,000 for the acquisition of lands and interests in lands and not to exceed $7,000,000 for development. Effective October 1, 1984, there is authorized to be appropriated such sums as may be necessary for the acquisition of the visitor contact and administrative site referred to in subsection (c) of section 698 of this title. Effective upon July 1, 1993, there is authorized to be appropriated such sums as may be necessary to carry out the purposes of subsections (c) and (d) of section 698 of this title.