Well, it seems that may change.
http://ca.news.yahoo.com/s/capress/100319/health/health_caffeine_beverages
http://ca.news.yahoo.com/s/capress/100319/health/health_caffeine_beverages
Health Canada announced Friday it is authorizing the use of caffeine as a food additive in all carbonated soft drinks, not just cola-type beverages. Beverage companies will be allowed to add synthetic caffeine to non-cola soft drinks in concentrations no higher than 150 parts per million. The maximum amount of caffeine allowed in colas is 200 parts per million.
Similar levels of caffeine are currently allowed in non-cola soft drinks outside Canada, including the United States and Europe.