1987—Subsec. (a)(2). Pub. L. 100–4 inserted “, such sums as may be necessary for fiscal years 1983 through 1985, and $75,000,000 per fiscal year for each of the fiscal years 1986 through 1990” after “1982”.

1980—Subsec. (a)(2). Pub. L. 96–483 inserted authorization of the sum of $75,000,000 per fiscal year for fiscal years 1981 and 1982.

1977—Subsec. (a)(2). Pub. L. 95–217 substituted “and the fiscal year ending June 30, 1975, $100,000,000 per fiscal year for the fiscal years 1977, 1978, 1979, and 1980” for “and the fiscal year ending June 30, 1975”.

1976—Subsec. (f)(3). Pub. L. 94–273 substituted “October” for “July”.

1975—Subsec. (a)(2). Pub. L. 93–592 substituted “June 30, 1974, and the fiscal year ending June 30, 1975;” for “June 30, 1974;”.