Vehicle inspection requirements vary by state, but when required, they are usually mandated every 12 months, or when vehicle ownership changes hands. In some states, such as New York, vehicle inspection stickers must be displayed on the car, along with an indication of emissions inspection. Cars can usually be inspected at department of motor vehicles-licensed stations for a fee.
Safety inspections are usually required yearly, while emissions inspections are only required of certain vehicles. In the state of Massachusetts, most new vehicles delivered to owners in Massachusetts are exempt.
Some states, like Colorado, do not require any safety inspection of vehicles. However, other test requirements vary by county within the state.