May tribes administer this part on BIA's behalf?

A tribe or tribal organization may contract or compact under the Indian Self-Determination and Education Assistance Act (25 U.S.C. 450f et seq. ) to administer any portion of this part that is not an approval or disapproval of a lease document, waiver of a requirement for lease approval (including but not limited to waivers of fair market rental and valuation, bonding, and insurance), cancellation of a lease, or an appeal.