All signs shall be designed, constructed and maintained in accordance with the following standards:
1. All signs shall comply with applicable provisions of the Uniform Building Code and the Electrical Code of the City at all times.
2. Except for banners, flags, temporary signs and window signs conforming in all respects with the requirements of this chapter, all signs shall be constructed of permanent materials and shall be permanently attached to the ground, a building or another structure by direct attachment to a rigid wall, frame or structure.
3. All signs shall be maintained in good structural condition, in compliance with all building and electrical codes, and in conformance with this chapter, at all times.