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 Utah, residents are required to title and register their vehicles with the Utah Division of Motor Vehicles (DMV). New residents must title and register their vehicles within 60 days of establishing residency. Utah law also mandates that vehicles undergo a safety inspection, but as of 2018, most vehicles are exempt from this requirement. However, vehicles that are eight years old or older (based on the model year) and are being registered for the first time in Utah must pass a safety inspection. Additionally, Utah requires emissions testing for vehicles in certain counties with more dense populations to improve air quality. These counties include Salt Lake, Utah, Davis, Weber, and Cache. The frequency of the emissions tests varies by the age of the vehicle and the county in which the vehicle is registered. For example, in Salt Lake County, vehicles less than six years old require an emissions test every two years, while older vehicles require testing every year.