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49 CFR Ch. I (10–1–18 Edition) 

§ 172.302 

on a cylinder used for both unodorized 
and odorized LPG. 

[Amdt. 172–123, 55 FR 52590, Dec. 21, 1990, as 
amended by Amdt. 172–151, 62 FR 1227, Jan. 8, 
1997; 62 FR 39404, July 22, 1997; 63 FR 16075, 
Apr. 1, 1998; 66 FR 45182, Aug. 28, 2001; 68 FR 
45030, July 31, 2003; 69 FR 64471, Nov. 4, 2004; 
70 FR 73164, Dec. 9, 2005; 71 FR 32258, June 2, 
2006; 76 FR 3365, Jan. 19, 2011; 76 FR 56314, 
Sept. 13, 2011; 78 FR 1072, Jan. 7, 2013; 78 FR 
65478, Oct. 31, 2013; 81 FR 35540, June 2, 2016] 

§ 172.302

General marking require-

ments 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 § 172.332 with the 
identification number specified for the 
material in the § 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 pack-

aging has a capacity of less than 3,785 
L (1,000 gallons); or 

(3) For cylinders permanently in-

stalled on a tube trailer motor vehicle, 
on each side and each end of the motor 
vehicle. 

(b) 

Size of markings. 

Except as other-

wise 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 gal-
lons) 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 § 173.23 of this sub-
chapter, the outside of each package 
used under the terms of a special per-
mit must be plainly and durably 
marked ‘‘DOT–SP’’ followed by the spe-
cial 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 poten-
tial hazard; or 

(2) Refilled, with a material requiring 

different markings or no markings, to 
such an extent that any residue re-
maining 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 pre-
scribed in §§ 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 re-
marked if the key words of the proper 
shipping name are identical to those 
currently specified in the § 172.101 
table. For example, a tank car marked 
‘‘NITRIC OXIDE’’ need not be re-
marked ‘‘NITRIC OXIDE, COM-
PRESSED’’. 

(g) A rail car, freight container, 

truck body or trailer in which the lad-
ing has been fumigated with any haz-
ardous material, or is undergoing fumi-
gation, must be marked as specified in 
§ 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] 

§ 172.303

Prohibited marking. 

(a) No person may offer for transpor-

tation or transport a package which is 
marked with the proper shipping name, 
the identification number of a haz-
ardous material or any other markings 
indicating that the material is haz-
ardous (e.g., RQ, INHALATION HAZ-
ARD) unless the package contains the 
identified hazardous material or its 
residue. 

(b) This section does not apply to— 
(1) Transportation of a package in a 

transport vehicle or freight container 

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