All existing signs and all signs hereafter erected, placed, posted, attached, painted or otherwise made visible from an adjacent property or right-of-way require a sign permit in accordance with the provisions of this article except as otherwise prohibited, exempted or not requiring a permit by this article. Any sign which requires a permit which is displayed without the requisite permit shall be in violation of this chapter and shall be considered an illegal sign.
(Code 1989, § 92.153)