No disassembled, dismantled, junked, inoperable, wrecked or unlicensed
vehicle, or parts thereof, shall be stored or allowed to remain in the open
upon public or private property within the county for a period in excess of
seven days unless it is in connection with an existing and operating auto
salvage yard, junkyard, garage, auto sales lot or auto service station located
in a properly zoned area for such business.