The county board may by ordinance declare all inoperable motor vehicles, whether on public or private property, to be a nuisance and authorize fines to be levied for the failure of any person to obey a notice received from the county which states that such person is to dispose of any inoperable motor vehicles under his or her control. However, nothing in this Section shall apply to any motor vehicle that is kept within a building when not in use, to historic vehicles over 25 years of age, or to a motor vehicle on the premises of a place of business engaged in the wrecking or junking of motor vehicles.
     As used in this Section, “inoperable motor vehicle” means any motor vehicle from which, for a period of at least 6 months, the engine, wheels or other parts have been removed, or on which the engine, wheels or other parts have been altered, damaged or otherwise so treated that the vehicle is incapable of being driven under its own power. “Inoperable motor vehicle” shall not include a motor vehicle which has been rendered temporarily incapable of being driven under its own motor power in order to perform ordinary service or repair operations.