[Code of Federal Regulations] [Title 49, Volume 4] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR383.21] [Page 877] TITLE 49--TRANSPORTATION CHAPTER III--FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 383--COMMERCIAL DRIVER'S LICENSE STANDARDS; REQUIREMENTS AND PENALTIES--Table of Contents Subpart B--Single License Requirement Sec. 383.21 Number of drivers' licenses. No person who operates a commercial motor vehicle shall at any time have more than one driver's license. [64 FR 48110, Sept. 2, 1999]