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the total ground-floor window area of the building, excluding the door windows. All <br />permanent window signs which have their lettering or graphic elements directly on the <br />glazing shall be painted, metal leafed, vinyl transferred, or in some other manner <br />permanently applied to the interior side of the glass of an exterior building window or <br />door. No application using a temporary adhesive shall be permitted unless the Planning <br />Director determines the application to be reasonably safe. <br />c. Temporary Signs. Signs advertising sales and specials shall not exceed thirty (30) <br />percent of the total ground-floor window area of any building, excluding the door <br />windows. Such signs must be displayed in conformance with the temporary sign <br />regulations listed in §154.212.J. <br />d. Under no circumstances shall any combination of permanent or temporary window <br />signage cover more than fifty percent (50%) of the total ground window area of any <br />building. <br />4. Changeable Copy Signs <br />a. Changeable copy signs are not an additional permitted sign type, but any permitted <br />sign type may be a changeable copy sign, provided that the total surface area of the <br />entire sign does not exceed the maximum allowed for the type and location of sign <br />upon which the changeable copy is displayed. <br />b. Electronic Variable Message Signs: Any sign type may be an electronic variable message <br />sign subject to the following regulations: <br />i. Surface Area. The areas of electronic variable message signs capable of displaying <br />copy shall not exceed forty (40) square feet and shall be included within the <br />maximum aggregate sign surface area allowed for the type and location of sign <br />upon which the changeable copy is displayed. <br />ii. Length of Cycle. The electronic changeable copy or images shall not alternate, <br />change, fade in, fade out, or otherwise change more frequently than once every <br />ten (10) seconds. Electronic variable message sign signs may not display scrolling, <br />racing, pixelating or moving characters or images, or similar actions that convey <br />motion. <br />iii. Color. All copy, characters or other changeable images shall be of one (1) color <br />only, with light copy on a dark background. <br />iv. Brightness Adjustment. An electronic variable message sign shall be equipped with <br />photosensitive equipment which automatically adjusts the brightness and contrast <br />of the sign in direct relation to the ambient outdoor illumination such that the light <br />level does not exceed three (3) foot candles at the front lot line and one (1) foot <br />candle at all other lot lines, measured three (3) feet above the surface of the <br />ground. <br />v. Maintenance. Any electronic variable message sign shall be maintained so as to be <br />able to display messages in a complete and legible manner. <br />5. Canopy and Awning Signs. The use of canopy and awning signs reduces the maximum area <br />of any allowed wall sign by half. Canopy and awning signs are subject to the following <br />provisions: <br />a. Surface Area. The sign surface area of a canopy or awning sign shall not exceed fifteen <br />(15) percent of the area of the vertical section of the canopies and awnings. The area <br />of the vertical section of the canopies and awnings is calculated as the difference <br />between the highest and lowest point on the canopy or awning multiplied by the length <br />of the canopy or awning measured parallel to the fa~ade upon which it is attached. <br />17