For the purposes of this subchapter, the term “Indian tribe” means any Indian tribe, band, group, and nation, including Alaska Indians, Aleuts, and Eskimos, and any Alaskan Native Village, of the United States, which is considered an eligible recipient under the Indian Self-Determination and Education Assistance Act ( Public Law 93–638 ) [ 25 U.S.C. 5301 et seq.] or was considered an eligible recipient under chapter 67 of title 31 prior to the repeal of such chapter.