The General Law for Tobacco Control, signed in February 2008, aims to protect the Mexican population against the negative effects associated with tobacco consumption and to guarantee the non-smoker's rights to live and relate in 100% smoke-free environments. The Law supports the development of smoke-free areas, but it also allows for indoor smoking areas. The present essay examines the Law and its Rule of Procedure, article by article, evaluating its capability to assure the protection of the population against the effects of environmental tobacco smoke. The analysis reveals conceptual and operative important imprecision, but mainly, discusses in detail the reasons why indoor smoking areas represent a health risk for the population. It concludes that the Law must be reformed, eliminating the provision of indoor smoking areas, any kind of roof in outdoor smoking areas and establishing a minimum distance between these areas and the 100% smoke-free environments.