In those situations the Secretary is required, as appropriate, to approve the portion of the program, function, service, or activity that is authorized under section 102(a) of the Act, or approve a level of funding that is authorized under section 106(a) of the Act. As noted in § 900.25 , the approval is subject to any alteration in the scope of the proposal that the Secretary and the Indian tribe or tribal organization approve.
25 C.F.R. §900.26