Public Law 93–638, referred to in subsec. (d)(4)(i), is Pub. L. 93–638, Jan. 4, 1975, 88 Stat. 2203, as amended, known as the Indian Self-Determination and Education Assistance Act, which is classified principally to subchapter II (§ 450 et seq.) of chapter 14 of this title. For complete classification of this Act to the Code, see Short Title note set out under section 450 of this title and Tables.