CFR›Title 25›Chapter I›Part 170›Subpart D›Subject Group Design ContainsSections 170.454–170.457CorpusDaily eCFRDisplayed edition2026-08-11Last updated2026-08-11 Sections 170.454 § 170.454 What design standards are used in the TTP? 170.455 § 170.455 What other factors must influence project design? 170.456 § 170.456 How can a Tribe request an exception from the design standards? 170.457 § 170.457 Can a Tribe appeal a denial? Previous Construction and Construction Monitoring Construction and Construction Monitoring Next Environmental and Archeological Requirements Environmental and Archeological Requirements