[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR172.302]

[Page 364-365]
 
                        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 
 
                            Subpart D_Marking
 
Sec.  172.302  General marking requirements for bulk packagings.

    (a) Identification numbers. Except as otherwise provided in this 
subpart, no person may offer for transportation or transport a hazardous 
material in a bulk packaging unless the packaging is marked as required 
by Sec.  172.332 with the identification number specified for the 
material in the Sec.  172.101 table--
    (1) On each side and each end, if the packaging has a capacity of 
3,785 L (1,000 gallons) or more;
    (2) On two opposing sides, if the packaging has a capacity of less 
than 3,785 L (1,000 gallons); or
    (3) For cylinders permanently installed on a tube trailer motor 
vehicle, on each side and each end of the motor vehicle.
    (b) Size of markings. Except as otherwise provided, markings 
required by this subpart on bulk packagings must--
    (1) Have a width of at least 6.0 mm (0.24 inch) and a height of at 
least 100 mm (3.9 inches) for rail cars;
    (2) Have a width of at least 4.0 mm (0.16 inch) and a height of at 
least 25 mm (one inch) for portable tanks with capacities of less than 
3,785 L (1,000 gallons) and IBCs; and
    (3) Have a width of at least 6.0 mm (0.24 inch) and a height of at 
least 50 mm (2.0 inches) for cargo tanks and other bulk packagings.
    (c) Special permit packagings. Except as provided in Sec.  173.23 of 
this subchapter, the outside of each package used under the terms of a 
special permit must be plainly and durably marked ``DOT-SP'' followed by 
the special permit number assigned. Packages authorized by an exemption 
issued prior to October 1, 2007 may be plainly and durably marked ``DOT-
E'' in lieu of ``DOT-SP'' followed by the number assigned as specified 
in the most recent version of that exemption.
    (d) Each bulk packaging marked with a proper shipping name, common 
name or identification number as required by this subpart must remain 
marked when it is emptied unless it is--
    (1) Sufficiently cleaned of residue and purged of vapors to remove 
any potential hazard; or
    (2) Refilled, with a material requiring different markings or no 
markings, to such an extent that any residue remaining in the packaging 
is no longer hazardous.
    (e) Additional requirements for marking portable tanks, cargo tanks, 
tank cars, multi-unit tank car tanks, and other bulk packagings are 
prescribed in Sec.  Sec.  172.326, 172.328, 172.330, and 172.331, 
respectively, of this subpart.
    (f) A bulk packaging marked prior to October 1, 1991, in conformance 
to the regulations of this subchapter in effect on September 30, 1991, 
need not be remarked if the key words of the proper shipping name are 
identical to those currently specified in the Sec.  172.101 table. For 
example, a tank car marked ``NITRIC OXIDE'' need not be remarked 
``NITRIC OXIDE, COMPRESSED''.

[[Page 365]]

    (g) A rail car, freight container, truck body or trailer in which 
the lading has been fumigated with any hazardous material, or is 
undergoing fumigation, must be marked as specified in Sec.  173.9 of 
this subchapter.

[Amdt. 172-123, 55 FR 52591, Dec. 21, 1990, as amended at 56 FR 66254, 
Dec. 20, 1991; Amdt. 172-150, 61 FR 50624, Sept. 26, 1996; Amdt. 172-
151, 62 FR 1228, Jan. 8, 1997; 62 FR 39398, July 22, 1997; 66 FR 45379, 
Aug. 28, 2001; 70 FR 73164, Dec. 9, 2005; 72 FR 55692, Oct. 1, 2007]