It shall be unlawful to erect, re-erect, construct, alter, or maintain any sign except as provided by this article and pursuant to a required permit for the same issued by the building official. Except as hereinafter provided, a permit shall be required for each sign. In addition, electrical permits shall be obtained for lighted or illuminated signs, and building permits shall be obtained for sign structures. A permit for alteration of a sign which involves only a change in copy, content or color and which does not involve any change in any part of the structure or lighting of the sign itself shall not be denied on the basis that the sign is otherwise nonconforming, if such sign was erected in accordance with applicable city ordinances.
(1996 Code, sec. 12.203)