Interpretation of Results The purpose of the three compliance surveys was to provide provincial compliance estimates of tobacco vendors, restaurants and bars with regards to the SFOA before and after the implementation of the SFOA. [...] In the majority of cases, the Enforcement Manager of the public health unit identified the Tobacco Enforcement Officer(s) to be personally interviewed for the study. [...] Ontario Tobacco Research Unit 17 Formative Evaluation of the Smoke-Free Ontario Act: Comprehensive Report Test Shopper Characteristics The Ministry of Health Promotion’s Protocol for Determination of Tobacco Vendor Compliance states that test shoppers hired by public health units must be between the ages of 15 and 17 years.44 The majority of test shoppers working in each of the selected public hea [...] Complete Sale In all cases, if the store clerk is willing to sell the tobacco product to the test shopper, then the test shopper pays for the tobacco product and leaves the store with the purchased tobacco product in hand. [...] Location of TEO During Purchase Attempt While the test shopper is in the store attempting to purchase a tobacco product, the TEO remains in the car or just outside the store if the store happens to be located inside a mall.