CFR›Title 25›Chapter I›25 CFR Part 83 Citation25 CFR Part 83ContainsSubparts Subpart A–Subpart DCorpusDaily eCFRDisplayed edition2026-08-04Last updated2026-08-04 PART 83—PROCEDURES FOR FEDERAL ACKNOWLEDGMENT OF INDIAN TRIBES Subparts Subpart A Subpart A—General Provisions Subpart B Subpart B—Criteria for Federal Acknowledgment Subpart C Subpart C—Process for Federal Acknowledgment Subpart D Subpart D—Re-Petition Authorization Process Authority5 U.S.C. 301; 25 U.S.C. 2, 9, 5131; 25 U.S.C. 5130 note (Congressional Findings); and 43 U.S.C. 1457.Source80 FR 37887, July 1, 2015, unless otherwise noted.