25 CFR 170.471 - How are projects administered?
(a) When a tribe carries out an IRR project under ISDEAA, BIA will monitor performance under the requirements of 25 CFR 900.130 and 900.131(b)(9) or 25 CFR 1000.243 and 1000.249(c) and (e), as appropriate. If BIA discovers a problem during an on-site monitoring visit, BIA must promptly notify the tribe and, if asked, provide technical assistance.
(1) For substantial changes, the original approving agency must review the change. The approving agency is the Federal, tribal, State, or local entity with PS&E approval authority over the project.
(3) A change that exceeds the limits of available funding may be made only with the approving agency's consent.