[Code of Federal Regulations] [Title 49, Volume 4] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR383.155] [Page 989] TITLE 49--TRANSPORTATION DEPARTMENT OF TRANSPORTATION PART 383_COMMERCIAL DRIVER'S LICENSE STANDARDS; REQUIREMENTS AND PENALTIES --Table of Contents Subpart J_Commercial Driver's License Document Sec. 383.155 Tamperproofing requirements. States shall make the CDL tamperproof to the maximum extent practicable. At a minimum, a State shall use the same tamperproof method used for noncommercial drivers' licenses.