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The article also stipulates that the warnings should be 50% or more of the principal display areas but shall be no less than 30% of the principal display areas. Photo: CNA A 2021 report by the Canadian Cancer Society found that 166 countries required health warnings on cigarette packaging, including 122 countries (about 73 percent) which required that health warnings cover 50 percent or more of the packaging, the HPA said
The Tobacco Hazards Prevention Act () promulgated in 1997 required warning message to be printed on cigarette packages, but it had a limited effect, so the act was amended in 2007 to ensure that warning images and text cover at least 35 percent of the packaging, starting in 2009