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Anyone wishing to sell a vehicle that is over four years old must first have a smog check performed. It is the seller's responsibility to get the smog certificate prior to the sale. If the vehicle is registered in California and was acquired from a spouse, domestic partner, sibling, child, parent, grandparent, or grandchild it is exempt. [4]
Vehicle emissions inspection station in Wisconsin. Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle. [27]California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.
Haagen-Smit also discovered that these air pollutants react with sunlight to form ozone, a major component of smog. As a response to this situation, the California Air Resources Board (CARB) was established in 1967 with Haagen-Smit as its first chairman. CARB set stringent vehicle emission standards to reduce air pollution in the state.
Vehicle inspection is a procedure mandated by national or subnational governments in many countries, in which a vehicle is inspected to ensure that it conforms to regulations governing safety, emissions, or both. Inspection can be required at various times, e.g., periodically or on the transfer of title to a vehicle.
In-use vehicles in the specified categories must meet 1997/98 emission standards for the respective new vehicle type (in the case of heavy duty engines NO x = 4.5 g/kWh, PM = 0.25 g/kWh). In other words, the 1997/98 new vehicle standards are retroactively applied to older vehicles already on the road. Vehicle owners have two methods to comply:
Licenses Smog Check stations, technicians, and inspectors. Licenses brake and lamp stations and adjusters. Mediates automotive repair complaints, saving California consumers millions of dollars each year in the form of direct refunds, rework, and bill adjustments. Investigates and takes disciplinary action against licensees who violate the law.
Image Dates issued Design Serial format Serials issued Notes 1905–13: Black on white; "CAL" at right 123456 1 to 122444 A one-time $2.00 fee is paid to register the vehicle, and the motorist must have a license plate made to hang from the rear of the vehicle (front plate also required starting in 1911).
Hoy No Circula is coupled with an exhaust monitoring program, known as verificación in Spanish, whereby a car's pollutant emissions are analyzed every six months. A sticker is affixed to each vehicle following an emissions test, indicating whether a vehicle is exempt from the program or not.