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 North Dakota, residents are required to title and register their vehicles with the North Dakota Department of Transportation (NDDOT). New residents must title and register their vehicles within 90 days of establishing residency. North Dakota does not require a state-wide vehicle safety inspection for passenger vehicles. However, commercial vehicles must pass safety inspections. As for emissions testing, North Dakota does not require emissions tests for any vehicles, as the state has not adopted the emissions testing programs that are present in some other states. This means that regardless of the county of residence, vehicle owners in North Dakota are not subject to emissions testing requirements.