In a rear yard, not to exceed 15 days, or in a garage, provided that no living quarters are maintained or business conducted in said mobile home, unless the time is extended by a Village Board special permit; provided, however, that if the mobile home is less than 24 feet in length, the same may be stored in the rear yard for an indefinite time, provided that no living quarters are maintained or business is conducted in said mobile home. (It is the intention of the Village Board, by this subsection, to permit an unoccupied mobile home 24 feet in length or over to be stored in a rear yard, outside of a garage, for a period not to exceed 15 days and to permit a mobile home less than 24 feet in length, generally being a camper-type home, to be stored, if unoccupied, in a rear yard outside of a garage for an indefinite period).