(A) Illumination. A billboard may be illuminated, provided such illumination is consistent with the requirements for a digital billboard as set forth herein, or is concentrated on the surface of the billboard and is located so as to avoid glare or reflection onto any portion of an adjacent street or highway, the path of oncoming vehicles or any adjacent premises.
(B) Appearance. All billboards must be stationary and may not contain any visible moving parts, alternating or moving messages, or have the appearance of having moving parts or messages. Under no circumstances may any type of billboard contain a message or display that appears to flash, undulate, pulse, move, or portray explosions, fireworks, flashes of light or blinking lights, or otherwise appears to move toward or away from the viewer, expand or contract, bounce, rotate, spin, twist, or make other comparable movements.
(C) Construction and maintenance. A billboard shall be constructed in such fashion that it will withstand all wind and vibration forces that can normally be expected to occur in the vicinity and in compliance with all applicable codes. A billboard shall be maintained so as to assure proper alignment of structure, continued structural soundness, and continued readability.
(D) Cap and replacement. Two to one replacement of off-premises billboard signage must be removed for every one square foot installed (see § 25-6-16.4 of this article).
(E) Display.
(1) The display or message on a digital billboard, of any type, may change no more frequently than once every ten seconds, with a transition period of two seconds or less. Distance between - 5,000 feet.
(2) The display or message must otherwise comply with division (B) above and the digital billboard must have installed an ambient light monitor which shall continuously monitor and automatically adjust the brightness level of the display based on ambient light condition consistent with terms of this chapter.
(3) Maximum brightness levels for digital billboards shall not exceed two-tenths foot candles over ambient light levels measured within 150 feet of the sign. Certification must be provided to the city demonstrating that the sign has been preset to automatically adjust the brightness to these levels or lower. Re-inspection and recalibration shall be annually required by the city, in its reasonable discretion, at the applicant/owners expense to ensure that the specified brightness levels are maintained at all times.
(4) Brightness of digital billboards shall be measured as follows:
(a) At least 30 minutes following sunset, a foot candle meter shall be used to obtain an ambient light reading for the location. This is done while the sign is off or displaying black copy. The reading shall be made with the meter aimed directly at the sign area at the pre-set location;
(b) The sign shall then be turned on to full white copy to take another reading with the meter at the same location; and
(c) If the difference between the readings is 0.2 candles or less, the brightness is properly adjusted.
(F) Other applicable laws. A billboard must comply with all applicable provisions of federal and state law.