Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.6503

Sec. 6503. (1) “Emission control device” means a catalytic converter, thermal reactor, or other component part used by a vehicle manufacturer to reduce emissions or to comply with emission standards prescribed by regulations promulgated by the United States environmental protection agency under the clean air act.

(2) “Fleet testing station” means a testing station that is authorized to conduct inspections on 10 or more vehicles owned or leased by 1 person.

(3) “Initial inspection” means an annual inspection performed on a motor vehicle for the first time in a test cycle.

(4) “Inspection” means testing of a motor vehicle for compliance with emission control requirements of this part and the clean air act.

(5) “Maintenance” means the repair or adjustment of a motor vehicle to bring that motor vehicle into compliance with emission control requirements of this part and rules promulgated under this part.

(6) “Motor vehicle” means a self-propelled vehicle as defined in section 79 of the Michigan vehicle code, Act No. 300 of the Public Acts of 1949, being section 257.79 of the Michigan Compiled Laws, that has a gross vehicle weight rating of 10,000 pounds or less and which is required to be registered for use upon the public streets and highways of this state under Act No. 300 of the Public Acts of 1949, being sections 257.1 to 257.923 of the Michigan Compiled Laws. For purposes of this part, motor vehicle includes those vehicles owned by the government of the United States, this state, and any political subdivision of this state.

(7) “National ambient air quality standards” means the air quality standards for outside air as established in the clean air act.