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4.23 A person must not import, offer for transport, handle or transport dangerous goods that are included in Class 6.1, Toxic Substances, in accordance with paragraph 2.28(c) of Part 2 (Classification), or Class 2.3, Toxic Gases, in accordance with paragraph 2.14(c) of Part 2 (Classification), unless the words “inhalation hazard” or “dangereux par inhalation” are displayed
(a) in the case of a small means of containment, in letters at least 12 mm high, next to the shipping name, unless these words are already part of the shipping name; and
(b) in the case of a large means of containment, on two opposite sides of the large means of containment, in addition to any placard or placard and UN number required by this Part, in letters
(i) at least 6 mm wide and 100 mm high in the case of a tank car,
(ii) at least 4 mm wide and 25 mm high in the case of a portable tank or an intermediate bulk container (IBC), and
(iii) at least 6 mm wide and 50 mm high in the case of all other large means of containment.
SOR/2014-159, s. 26; SOR/2017-137, s. 33