12.55.030: SIGNS MUST BE PERMITTED OR EXEMPTED:
   A.   No "sign", as defined in this code, may be displayed on public property unless a public property sign permit therefor has first been issued, or the sign is expressly exempted from the public property sign permit requirement by this chapter.
   B.   All public property sign permits shall be consistent with this chapter. Any sign posted on public property contrary to the provisions of this chapter may be summarily removed as a trespass and a nuisance by the city. (Ord. 2520 § 1, 2002)