Tribal transportation planning funds described in § 170.200(a)(1) are calculated pro rata to each Tribe's final percentage as determined under §§ 170.200 through 170.202 . Upon request of a Tribal government and approval by the BIA Regional Office or FHWA, these funds are made available to the Tribes under applicable BIA and FHWA contracting procedures.
25 C.F.R. §170.203