Upon request of a tribal government and approval by the BIA Regional Office, BIA allocates tribal transportation planning funds described in Sec. 170.403 pro rata according to the tribes' relative need percentage from the RNDF described in Sec. 170.223. The tribal transportation planning funds will be distributed in accordance with the BIA procedures for self-governance tribes that negotiate tribal transportation planning in their annual funding agreements and to BIA Regional Offices for all other tribes.