16 U.S.C. § 410y-1aSection
§ 410y–1a. Boundary revision
The boundaries of the park are revised to include approximately 600 additional acres.
(Pub. L. 95–625, title III, §320, Nov. 10, 1978, 92 Stat. 3488; Pub. L. 96–199, title I, §101(c), Mar. 5, 1980, 94 Stat. 68.)