1978—Pub. L. 95–625 increased land acquisition appropriations authorization to $39,948,000 from $30,071,500.

1976—Pub. L. 94–578 substituted “$30,071,500” for “$16,115,000” in provision covering the acquisition of lands and interests in lands and substituted “For development of the national river, there are authorized to be appropriated not to exceed $9,371,000” for “For development of the national river, there are authorized to be appropriated not more than $283,000 in fiscal year 1974; $2,923,000 in fiscal year 1975; $3,643,000 in fiscal year 1976; $1,262,000 in fiscal year 1977; and $1,260,000 in fiscal year 1978. The sums appropriated each year shall remain available until expended”.