25 CFR § 170.450 - What archeological and environmental requirements must the TTP meet?

---
identifier: "/us/cfr/t25/s170.450"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "25 CFR § 170.450 - What archeological and environmental requirements must the TTP meet?"
title_number: 25
title_name: "Indians"
section_number: "170.450"
section_name: "What archeological and environmental requirements must the TTP meet?"
chapter_name: "BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR"
subchapter_number: "H"
subchapter_name: "LAND AND WATER"
part_number: "170"
part_name: "TRIBAL TRANSPORTATION PROGRAM"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Pub. L. 112-141, Pub. L. 114-94; 5 U.S.C. 2; 23 U.S.C. 201, 202; 25 U.S.C. 2, 9."
regulatory_source: "81 FR 78463, Nov. 7, 2016, unless otherwise noted."
cfr_part: "170"
---


# 170.450 What archeological and environmental requirements must the TTP meet?

All BIA, FHWA, and Tribal work for the TTP must comply with cultural resource and environmental requirements under applicable Federal laws and regulations. A list of applicable laws and regulations is shown in appendix A to this subpart and is also available in the official Tribal Transportation Program Guide.