The following exceptions apply to labeling:

• A label is not required to be displayed on a small means of containment that is inside another small means of containment if the other small means of containment has a label displayed on it and is not opened during loading or unloading or while the dangerous goods are in transport;
• The oxidizing gas label must be displayed on a small means of containment for the following dangerous goods:
  • UN1072, OXYGEN, COMPRESSED,
  • UN1073, OXYGEN, REFRIGERATED LIQUID,
  • UN3156, COMPRESSED GAS, OXIDIZING, N.O.S., and
  • UN3157, LIQUEFIED GAS, OXIDIZING, N.O.S.;
• The Class 9, lithium battery label, illustrated in the Part 4 appendix, must be displayed on a small means of containment for the following dangerous goods:
  • UN3090, LITHIUM METAL BATTERIES,
  • UN3091, LITHIUM METAL BATTERIES CONTAINED IN EQUIPMENT or LITHIUM METAL BATTERIES PACKED WITH EQUIPMENT,
  • UN3480, LITHIUM ION BATTERIES, and
  • UN3481, LITHIUM ION BATTERIES CONTAINED IN EQUIPMENT or LITHIUM ION BATTERIES PACKED WITH EQUIPMENT;
• If the dangerous goods are included in Class 7, Radioactive Materials, two labels must be displayed on the small means of containment for the primary class; and
• If the dangerous goods are included in Class 2, Gases, and are contained in a combination of cylinders each with a capacity greater than 225 L that form a single unit from being interconnected through a piping arrangement, and are permanently mounted on a structural frame for transport, and have a combined capacity exceeding 450 L, the combination of cylinders may be placarded as one large means of containment.

For the subsidiary class of Class 1, the label to be displayed is the label for Class 1.1, 1.2, or 1.3.

Despite the labeling requirements, a label need not be displayed on a small means of containment that holds a radioactive material if the shipping name and UN number of the radioactive material are displayed on the small means of containment and:

• The radioactive material is contained in an exposure device, as defined in the Nuclear Substances and Radiation Devices Regulations, and the small means of containment is marked in accordance with paragraph 16(5)(a) of the Packaging and Transport of Nuclear Substances Regulations; or
• The radioactive material is LSA-I material, as defined in Subsection 1(1) of the Packaging and Transport of Nuclear Substances Regulations, and the small means of containment is marked in accordance with paragraph 16(5)(c) of the Packaging and Transport of Nuclear Substances Regulations.