If the size of a label or a placard is reduced, every symbol, letter and number required on that label or placard must be reduced proportionately.
If a large means of containment contains dangerous goods included in Class 7, Radioactive Materials, and a Class 7
placard is required to be displayed in accordance with the Regulations, the means of containment must have displayed on it
the Class 7 placard required or the appropriate optional Class 7 placard.
Click on the PDF icon to see the Transport Canada's "The Marks of Safety"