The use and display of strings or streamers of flags, pennants, banners (except if a permit is approved and obtained for special promotions, events and grand openings as set forth in Subsection
13-17.10b), balloons, spotlights or spinners or similar objects and devices across, upon, over or along any premises or building, whether as a part of any sign or for advertising or public attraction or otherwise, are prohibited in any zone; provided, however, that this provision shall not apply to decorations customarily used for holiday display or Township celebration.