There are authorized to be appropriated for purposes of carrying out sections 857–13 to 857–18 of this title not to exceed $520,000 for the fiscal year ending September 30, 1978, $572,000 for the fiscal year ending September 30, 1979, $565,000 for the fiscal year ending September 30, 1980, $600,000 for the fiscal year ending September 30, 1981, and $555,000 for the fiscal year ending September 30, 1982. Such sums as may be appropriated under this section shall remain available until expended.