Introduced in the 34th Canadian Parliament, and receiving royal assent on June 23, 1992, the act regulates the transportation of dangerous goods in the country.
Class 2.1, Flammable Gases, bears a black or white flame symbol on a red background.
Class 2.2, Non-flammable and Non-toxic Gases, bears a black or white gas cylinder symbol on a green background.
If a product is an oxidizing gas, a yellow placard with black text and a flaming 'O' symbol must be displayed.
Class 4.1, Flammable Solids, has a black symbol with a vertically striped red and white background.