Any sign that, in the opinion of the chief building official or the public works director, is unsafe or insecure shall be deemed an unsafe sign and shall be corrected or removed, together with any supporting structure, by the owner of the property on which the sign is located, within seventy-two hours of written notice by the community development department. (Ord. 1667 § 3(2) (Exh. A (part)), 2019)