Act of 1975 ( 25 U.S.C. 5301 et seq.), the Education Amendments of 1978 ( 25 U.S.C. 2001–2019 ), and the Tribally Controlled Schools Act of 1988 ( 25 U.S.C. 2501 et seq.), $2,414,577,000, to remain available until September 30, 2020, except as otherwise provided herein