25 CFR §170.618
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
All funds made available to a Tribe through the 23 U.S.C. 202(b) are considered “tribal” and are available to the Tribe until expended. However, they must be expended on projects and activities referenced on an FHWA-approved TTPTIP.