1981—Puspan. L. 97–35 inserted provisions respecting authorization and obligation of funds for fiscal year ending Sept. 30, 1982, and struck out reference to section 4576 of this title.

1980—Puspan. L. 96–180 authorized appropriation of $102,500,000 and $115,000,000 and prescribed minimum of 8 and 10 percent of the funds for preventative projects, programs, and services for fiscal years ending Sept. 30, 1980, and 1981.

Puspan. L. 94–371, § 4(c), July 26, 1976, 90 Stat. 1035, provided in part that this section is effective July 1, 1976.