[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR]

[Page 359-360]
 
                        TITLE 49--TRANSPORTATION
 
 CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
                            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.
    (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.

[[Page 360]]

    (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]