---identifier: "/us/cfr/t23/s635.603"source: "ecfr"legal_status: "authoritative_unofficial"title: "23 CFR § 635.603 - Applicability."title_number: 23title_name: "Highways"section_number: "635.603"section_name: "Applicability."chapter_name: "FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"subchapter_number: "G"subchapter_name: "ENGINEERING AND TRAFFIC OPERATIONS"part_number: "635"part_name: "CONSTRUCTION AND MAINTENANCE"positive_law: falsecurrency: "2026-04-05"last_updated: "2026-04-05"format_version: "1.1.0"generator: "[email protected]"authority: "Sections 1525 and 1303 of Pub. L. 112-141, Sec. 1503 of Pub. L. 109-59, 119 Stat. 1144; 23 U.S.C. 101 (note), 109, 112, 113, 114, 116, 119, 128, and 315; 31 U.S.C. 6505; 42 U.S.C. 3334, 4601 Sec. 1041(a), Pub. L. 102-240, 105 Stat. 1914; 23 CFR 1.32; 49 CFR 1.85(a)(1)."cfr_part: "635"---
Identifier
/us/cfr/t23/s635.603
Currency
2026-04-05
Positive Law
No
Updated
2026-04-05
Chapter
Federal Highway Administration, Department of Transportation
Authority
Sections 1525 and 1303 of Pub. L. 112-141, Sec. 1503 of Pub. L. 109-59, 119 Stat. 1144; 23 U.S.C. 101 (note), 109, 112, 113, 114, 116, 119, 128, and 315; 31 U.S.C. 6505; 42 U.S.C. 3334, 4601 Sec. 104... Sections 1525 and 1303 of Pub. L. 112-141, Sec. 1503 of Pub. L. 109-59, 119 Stat. 1144; 23 U.S.C. 101 (note), 109, 112, 113, 114, 116, 119, 128, and 315; 31 U.S.C. 6505; 42 U.S.C. 3334, 4601 Sec. 1041(a), Pub. L. 102-240, 105 Stat. 1914; 23 CFR 1.32; 49 CFR 1.85(a)(1).
# 635.603 Applicability.(a) Except as provided in paragraph (b) of this section, the provisions of this subpart apply to all Federal-aid construction projects.(b) This subpart does not apply to engineering and design service contracts, to which 23 CFR part 172 applies, or Federal Lands Highway contracts, to which 48 CFR subpart 16.5 applies.