Transportation of Dangerous Goods Regulations

4.15.2 (1) The UN number for each of the dangerous goods in a large means of containment, other than dangerous goods included in Class 1, must be displayed on the large means of containment if the dangerous goods

• (a) are in a quantity or concentration for which an ERAP is required; or

• (b) are a liquid or a gas in direct contact with the large means of containment.

(2) Subject to subsection  4.15.3(2), the UN number must be written without the prefix “UN” in black characters at least 65 mm high and displayed

• (a) on an orange panel next to the primary class placard for the dangerous goods or next to the oxidizing gas placard, in the case of dangerous goods that are referred to in section 4.18.1; or

• (b) within a white rectangle located on the primary class placard for the dangerous goods — or on the oxidizing gas placard, in the case of dangerous goods that are referred to in section 4.18.1 — if the white rectangle does not obscure any symbol or text on the placard.