(a) No person may erect or maintain a detached non-premise sign in the city. It is a defense to prosecution under this subsection that the sign:
(1) is a nonconforming use;
(2) is a special purpose sign, movement control sign, protective sign, or vehicular sign as defined in this article;
(3) is a sign that contains primarily a political message for which a permit is not required under Section 51A-7.602;
(4) is in a special provision sign district or planned development district and expressly authorized by and in full compliance with the ordinances establishing and amending that district;
(5) was lawfully relocated pursuant to Section 51A-7.307;
(6) is expressly authorized by and in full compliance with a valid order of the court or board of adjustment; or
(7) is a sign adverting an occasional sale (garage sale) pursuant to Sections 51-4.217(b)(5) or 51A-4.217(b)(9).
(b) A lawfully erected detached non-premise sign in a special provision sign district or planned development district shall be considered a legal (as opposed to non-conforming) use if it is expressly authorized by and in full compliance with the ordinances establishing and amending that district. (Ord. Nos. 19455; 19766; 19786; 20360; 20927; 21663; 22392; 24232; 25921; 29024)