US lawFederal (United States)RegulationsTitle 23 CFR — HighwaysChapter III — NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 1340 — UNIFORM CRITERIA FOR STATE OBSERVATIONAL SURVEYS OF SEAT BELT USESubpart A — General1340.123 C.F.R. § 1340.1Purpose.Last amended: 2017Year: 2026Length: 33 wordsOfficial source Cite as 23 C.F.R. § 1340.1 (2026)This part establishes uniform criteria for State surveys of seat belt use conducted under 23 U.S.C. 402, procedures for NHTSA approval of survey designs, and administrative requirements relating to State seat belt surveys.Cross-references to the US Code23:402Next23 C.F.R. § 1340.2