400 

49 CFR Ch. I (10–1–18 Edition) 

§ 172.328 

(c) As an alternative to the marking 

required in (a) and (b) of this section, a 
label, tag, or sign may be displayed at 
each location (

e.g., 

manhole, loading 

head) where exposure to hydrogen sul-
fide vapors may occur. The label, tag, 
or sign must be durable, in English, 
and printed legibly and of a size rel-
ative to the package with a warning 
statement such as ‘‘Danger, Possible 
Hydrogen Sulfide Inhalation Hazard’’ 
to communicate the possible risk of ex-
posure to harmful concentrations of 
hydrogen sulfide gas. 

[76 FR 3367, Jan. 19, 2011, as amended at 80 
FR 1150, Jan. 8, 2015] 

§ 172.328

Cargo tanks. 

(a) 

Providing and affixing identification 

numbers. 

Unless a cargo tank is already 

marked with the identification num-
bers required by this subpart, the iden-
tification numbers must be provided or 
affixed as follows: 

(1) A person who offers a hazardous 

material to a motor carrier for trans-
portation in a cargo tank shall provide 
the motor carrier the identification 
numbers on placards or shall affix or-
ange panels containing the required 
identification numbers, prior to or at 
the time the material is offered for 
transportation. 

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