"Carport" means a permanent, roofed structure with not more than two (2) enclosed sides, used or intended to be used for automobile shelter and storage. Each dwelling unit shall have not less than one hundred eighty (180) cubic feet of enclosed storage space within a carport or other acceptable structure. Such storage space shall not encroach into required parking dimensions nor reduce the utility of a parking space. (Ord. 1000 § 6.20, 1955)