For the acquisition of lands and interests in lands, there are authorized to be appropriated not more than $39,948,000. For development of the national river, there are authorized to be appropriated not to exceed $9,371,000.
(Pub. L. 92–237, § 7, Mar. 1, 1972, 86 Stat. 46; Pub. L. 94–578, title I, § 101(3), title III, § 310, Oct. 21, 1976, 90 Stat. 2732, 2736; Pub. L. 95–625, title II, § 201(2), Nov. 10, 1978, 92 Stat. 3473.)