There are hereby authorized to be appropriated such sums as may be necessary to carry out the provisions of this subchapter, but not more than $4,100,000 for development and not more than $1,400,000 for the acquisition of lands and interests therein for the Lyndon B. Johnson National Historical Park.

(Pub. L. 91–134, § 3, Dec. 2, 1969, 83 Stat. 274; Pub. L. 96–87, title IV, § 403, Oct. 12, 1979, 93 Stat. 667; Pub. L. 96–607, title VI, § 601(2), (3), Dec. 28, 1980, 94 Stat. 3540.)