No sign shall hereafter be erected, re-erected, constructed, altered, or relocated except as provided by this code and a permit for the same has been issued by the building official. A separate permit shall be required for a sign or signs for each business entity and/or a separate permit shall be required for each group of signs on a single supporting structure. In addition, electrical permits shall be obtained for electric signs. (Ord. 817 § 2, 1996).