CFR›Title 23›Chapter I›Part 633›Subpart A ContainsSections 633.101–633.104CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart A—Federal-Aid Construction Contracts (Other Than Appalachian Contracts) Sections 633.101 § 633.101 Purpose. 633.102 § 633.102 Applicability. 633.103 § 633.103 Regulatory authority. 633.104 § 633.104 Availability. Authority23 U.S.C. 114 and 315; 49 CFR 1.48.Source52 FR 36920, Oct. 2, 1987, unless otherwise noted.