25 C.F.R. § 170.616
How are payments made to Tribes if additional funds are available?
After an Agreement between BIA or FHWA and the Tribe is executed, any additional funds will be made available to Tribes under the terms of the executed Agreement.
After an Agreement between BIA or FHWA and the Tribe is executed, any additional funds will be made available to Tribes under the terms of the executed Agreement.