Chicago has officially begun implementing procedures meant to regulate and control the sale and use of e-cigarettes within its city limits.

The policies, which went into effect on Tuesday, are largely focused on preventing minors access to e-cigarettes. They will require identification to purchase, as sales to anyone below 18 years of age is now prohibited, and they must be kept behind counters in stores. The ban on e-cigarettes also includes the use of the devices in any enclosed space meant for the public. This includes restaurants, bars, workplaces, stores, and entertainment venues.

The restrictions are supported by Mayor Rahm Emanuel, who favors an aggressive approach to restricting tobacco products that includes taxing cigarettes at higher rates and banning the sale of flavored tobacco close to school zones.

Not everyone supports the new policies as they stand, however, arguing that they are perhaps stricter than e-cigarettes actually warrant. Because e-cigarettes contain no actual tobacco and therefore far fewer harmful chemicals than traditional cigarettes, many argue that they are healthier alternatives to cigarettes that could have the potential to aid in smoking cessation. To date, research on those points is inconclusive, though.

Chicago’s new policies follow closely on the heels of the FDA’s recently released report that called for similar restrictions to be placed on e-cigarettes, including banning the sale of them to minors as well as prohibiting the distribution of free samples. The FDA’s proposal was both criticized for not including restrictions on marketing as well as praised for not basing its recommendations for regulations on the already established protocol for traditional cigarettes. Restrictions outlined for Chicago go further than the FDA proposed regulations by cutting off marketing that could be directed toward children and preventing second hand exposure to vapors produced by the e-cigarettes.

Residents of Chicago are encouraged to call 311 to file a complaint should they witness infractions on the newly implemented policies.