[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: 49CFR392.33] [Page 1131] TITLE 49--TRANSPORTATION DEPARTMENT OF TRANSPORTATION PART 392_DRIVING OF COMMERCIAL MOTOR VEHICLES--Table of Contents Subpart D_Use of Lighted Lamps and Reflectors Sec. 392.33 Obscured lamps or reflectors. No commercial motor vehicle shall be driven when any of the required lamps or reflectors are obscured by the tailboard, by any part of the load, by dirt, or otherwise. [33 FR 19732, Dec. 25, 1968, as amended at 60 FR 38747, July 28, 1995]