(a) "Automotive maintenance" means the lubrication of automobiles and replacement or installation of minor parts and accessories, but not including major repair work, such as motor replacement, body and fender repairs or spray painting.
(b) "Automotive repair" means the repair, rebuilding or reconditioning of motor vehicles or parts thereof, including collision service, painting and steam cleaning of vehicles.
(c) "Automotive sales" means the sale or rental of new or used motor vehicles or trailers, and automotive maintenance.