23 CFR § 661.45 - What happens when TTFBP funds cannot be obligated by the end of the fiscal year?

---
identifier: "/us/cfr/t23/s661.45"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "23 CFR § 661.45 - What happens when TTFBP funds cannot be obligated by the end of the fiscal year?"
title_number: 23
title_name: "Highways"
section_number: "661.45"
section_name: "What happens when TTFBP funds cannot be obligated by the end of the fiscal year?"
chapter_name: "FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "G"
subchapter_name: "ENGINEERING AND TRAFFIC OPERATIONS"
part_number: "661"
part_name: "TRIBAL TRANSPORTATION FACILITY BRIDGE PROGRAM (TTFBP)"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "23 U.S.C. 120(j) and (k), 202, and 315; 49 CFR 1.81, 1.84, 1.85; 23 CFR part 490, subpart D."
regulatory_source: "89 FR 57082, July 12, 2024, unless otherwise noted."
cfr_part: "661"
---


# 661.45 What happens when TTFBP funds cannot be obligated by the end of the fiscal year?

The TTFBP funds from the Highway Trust Fund (HTF) provided to a project that cannot be obligated by the end of the fiscal year are to be returned to FHWA during August redistribution. The returned funds will be re-allocated to the BIA the following fiscal year after FHWA receives and accepts a formal request for the funds from BIA, which includes a justification for the amounts requested and the reason for the failure of the prior year obligation.