US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter III — FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 383 — COMMERCIAL DRIVER'S LICENSE STANDARDS; REQUIREMENTS AND PENALTIESSubpart J — Commercial Learner's Permit and Commercial Driver's License Documents383.15549 C.F.R. § 383.155Tamperproofing requirements.Last amended: 2016Year: 2026Length: 35 wordsOfficial source Cite as 49 C.F.R. § 383.155 (2026)States must make the CLP and CDL tamperproof to the maximum extent practicable. At a minimum, a State must use the same tamperproof method used for noncommercial drivers' licenses. [76 FR 26893, May 9, 2011]Previous49 C.F.R. § 383.153