[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR172.336] [Page 371-372] TITLE 49--TRANSPORTATION CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 172_HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, AND TRAINING REQUIREMENTS--Table of Contents Subpart D_Marking Sec. 172.336 Identification numbers; special provisions. (a) When not required or prohibited by this subpart, identification numbers may be displayed on a transport vehicle or a freight container in the manner prescribed by this subpart. (b) Identification numbers, when required, must be displayed on either orange panels (see Sec. 172.332(b)) or on a plain white square- on-point display configuration having the same outside dimensions as a placard. In addition, for materials in hazard classes for which placards are specified and identification number displays are required, but for which identification numbers may not be displayed on the placards authorized for the material (see Sec. 172.334(a)), identification numbers must be displayed on orange panels or on the plain white square- on-point display configuration in association with the required placards. An identification number displayed on a white square-on-point display configuration is not considered to be a placard. [[Page 372]] (1) The 100 mm (3.9 inch) by 215 mm (8.5 inches) area containing the identification number shall be located as prescribed by Sec. 172.332 (c)(1) and (c)(2) and may be outlined with a solid or dotted line border. (2) [Reserved] (c) Identification numbers are not required: (1) On the ends of a portable tank, cargo tank or tank car having more than one compartment if hazardous materials having different identification numbers are being transported therein. In such a circumstance, the identification numbers on the sides of the tank shall be displayed in the same sequence as the compartments containing the materials they identify. (2) On a cargo tank containing only gasoline, if the cargo tank is marked ``Gasoline'' on each side and rear in letters no less than 50 mm (2 inches) high, or is placarded in accordance with Sec. 172.542(c). (3) On a cargo tank containing only fuel oil, if the cargo tank is marked ``Fuel Oil'' on each side and rear in letters no less than 50 mm (2 inches) high, or is placarded in accordance with Sec. 172.544(c). (4) For each of the different liquid petroleum distillate fuels, including gasoline and gasohol in a compartmented cargo tank or tank car, if the identification number is displayed for the distillate fuel having the lowest flash point. (5) For each of the different liquid petroleum distillate fuels, including gasoline and gasohol transported in a cargo tank, if the identification number is displayed for the liquid petroleum distillate fuel having the lowest flash point. (6) On nurse tanks meeting the provisions of Sec. 173.315(m) of this subchapter. [Amdt. 172-101, 45 FR 74667, Nov. 10, 1980, as amended by Amdt. 172-74, 47 FR 40365, Sept. 30, 1982; Amdt. 172-109, 52 FR 13038, Apr. 20, 1987; Amdt. 172-110, 52 FR 29528, Aug. 10, 1987; Amdt. 172-123, 55 FR 52593, Dec. 21, 1990; 56 FR 66255, Dec. 20, 1991; 65 FR 50459, Aug. 18, 2000]