Canada has had three phases of tobacco warning labels. The first set of warnings was introduced in 1989 under the Tobacco Products Control Act, and required warnings to be printed on all tobacco products sold legally in Canada. The set consisted of four messages printed in black-and-white on the front and back of the package, and was expanded in 1994 to include eight messages covering 25% of the front top of the package. In 2000, the Tobacco Products Information Regulations (TPIR) were passed under the Tobacco Act. The regulations introduced a new set of sixteen warnings. Each warning was printed on the front and back of the package, covering 50% of the surface, with a short explanation and a picture illustrating that particular warning, for example: