Most states have titling and registration laws that require residents to title and register their cars in the state—and for new residents of the state to do so within some period of time, such as 30 days. Some states require titled cars to pass a comprehensive safety inspection. And some states also require cars owned by residents of certain counties to pass an emissions test/inspection designed to improve air quality in more densely populated counties.
In Georgia, residents are required to title and register their vehicles with the Georgia Department of Revenue. New residents must title and register their vehicles within 30 days of establishing residency. Georgia law does not mandate a state-wide vehicle safety inspection for passenger vehicles. However, an emissions inspection is required annually for vehicles registered in 13 metro Atlanta counties to comply with the Clean Air Act. These counties include Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Forsyth, Fulton, Gwinnett, Henry, Paulding, and Rockdale. The emissions test is necessary for most cars, light trucks, and SUVs that are three to 25 years old. Electric vehicles are exempt from this requirement. Failure to comply with the emissions inspection can result in the inability to renew the vehicle's registration.