The following signs are prohibited by this title:
A. Any sign which, by reason of its size, location, movement, content, coloring, or manner of illumination, constitutes an obvious traffic hazard or a detriment to traffic safety by obstructing or detracting from the visibility of any official traffic-control device is prohibited;
B. Any sign which contains or is an imitation of an official traffic sign or signal, except for private traffic direction or traffic-control;
C. Any sign, other than a time or temperature device, which contains blinking or flashing lights;
D. Any sign which contains or consists of banners, pennants, ribbons, streamers, strings of light bulbs, spinners or similar devices;
E. Any sign which for thirty consecutive days has directed attention to a product, place, activity, person, institution, or business which was formerly but is no longer in operation or existence on the premises:
F. Portable signs or signs of a temporary nature describing commercial businesses or activities.
(Ord. 81-11 Art. XIII § 3, 1980).