25 CFR 170.406 - How must tribes use planning funds?
(a) IRR Program funds as defined in 23 U.S.C. 204(j) are only available upon request of a tribal government and approved by the BIA Regional Office. These funds support development and implementation of tribal transportation planning and associated strategies for identifying transportation needs, including:
(1) Attending transportation planning meetings;
(2) Pursuing other sources of funds; and
(3) Developing the tribal priority list or any of the transportation functions/activities as defined in the FHWA IRR Program Transportation Planning Procedures and Guidelines (TPPG) or listed in § 170.402.
(b) A tribe may ask the BIA regional office to enter into a self-determination contract or self-governance agreement for transportation planning activities and functions under ISDEAA or it may request a travel authorization to attend transportation planning functions and related activities using these funds. (See appendix A of subpart B for use of IRR Program Funds.)