Yes. The Tribal Self-Governance Act (25 U.S.C. 458 ) and the Indian Self-Determination and Education Assistance Act (25 U.S.C. 450 et seq.) provide other options for trust funds management. A tribe may choose to manage its trust funds under the provisions of these Acts if it wishes. These options are covered by 25 CFR part 900 (the "Indian Self-Determination and Education Assistance Act Program") and 25 CFR part 1000 (the "Self-Governance Program").
25 C.F.R. §1200.4