2018—Subsec. (b). Pub. L. 115–334 substituted “2023” for “2018”.

2015—Subsec. (b). Pub. L. 114–54 substituted “there are authorized to be appropriated $3,000,000 for each of fiscal years 2016 through 2018” for “during the five-year period beginning October 1, 1992, there are authorized to be appropriated $1,000,000 annually”.

1993—Subsec. (b). Pub. L. 103–106 substituted “beginning October 1, 1992” for “following November 16, 1990”.