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(1) Interim use permit. Any UP issued for an interim use billboard shall automatically expire no later than 07-01-2037 or <br />earlier if so indicated in the resolution approving the IUP. <br />(2) Maximum sign area. The maximum gross surface display area of the sign cannot exceed 700 square feet per side <br />except that any rectangular billboard may contain temporary extensions, cutouts, or top lettering which occupy a total area <br />not in excess of 25% of the area of the basic billboard and form an integral part of the design thereof. No such temporary <br />extension, cut out or top lettering may project more than six feet from the top, 18 inches from either side or 15 inches from <br />the bottom of the basic rectangular advertising message. The area of an extension, cutout or top lettering shall be deemed <br />to be the area of the smallest rectangle into which the extension, cutout or top lettering will fit. <br />(3) Orientation of sign faces. Billboards may have no more than two sign faces. Sign faces must be back-to-back with <br />sign faces parallel or angled. All billboards with their faces back-to-back and parallel shall have no greater distance than <br />eight feet between the faces. All billboards with faces at an angle shall have no greater angle than 35 degrees. <br />(4) Maximum sign height. The maximum allowable height of billboards shall be 45 feet, except for billboards located on <br />County Road 10 or on Interstate 35W between County Road H2 and County Road I, in which cases the height shall be <br />limited to 35 feet. The height shall be measured from the grade at the base of the sign or from the surface of the roadway <br />whichever is higher. <br />(5) Obstruction. No billboard may be located in such a manner as to obscure or otherwise interfere with the <br />effectiveness of an official traffic sign, signal or device, or obstruct or interfere with a driver's view of approaching, merging <br />or intersecting traffic. <br />(6) Dynamic displays. All billboards with dynamic displays shall meet all the requirements of §161.038 of this chapter. <br />(G) Home occupation signs. In the R-1, R-2 and R-5 Residential Zoning Districts, a sign not to exceed one square foot is <br />allowed to be displayed; provided, the sign is attached to the house or garage of the property on which the home occupation <br />takes place. <br />(H) Dynamic display signs. <br />(1) The city allows non-commercial dynamic display signs wherever the city allows commercial dynamic display signs. <br />The signs are subject to the same standards and total maximum allowances per site or building of each sign type specified <br />in this chapter. <br />(2) Standards for all dynamic display signs. <br />(a) The messages, content and images on all such displays shall not flash or blink. <br />(b) No person or contractor shall install a dynamic display sign that because of its position, shape, movement or color, <br />interferes with the proper functioning of a traffic sign, signal or that constitutes a traffic hazard. <br />(c) All dynamic display signs shall have ambient light monitors and shall, at all times, allow the monitors to <br />automatically adjust the brightness level of the sign based on light conditions. <br />(d) The manufacturers, owners and operators of dynamic display signs must design and equip such signs with a fully <br />functional monitoring off switch system that automatically shuts the sign off or will freeze the device or sign in one position; if <br />a malfunction occurs. The signs and displays also must be equipped with a means to shut off or discontinue the display if it <br />malfunctions. The sign owner or operator must stop or shut off the dynamic display within one hour or as soon as <br />reasonably possible of the city notification that the sign is not meeting the standards of this chapter. <br />(e) Any dynamic display sign capable of accessing and utilizing State Amber Alert technology shall display such <br />messages as they are made available by the state's Department of Public Safety or other responsible agency. <br />(f) All dynamic display signs shall meet the following brightness standards. <br />1. No sign shall be brighter than is necessary for clear and adequate visibility and no sign shall exceed 500 Nits <br />(candelas per square meter) at night and 7,500 Nits (candelas per square meter) during the day. <br />2. No sign shall be of such intensity or brilliance as to impair the vision of a motor vehicle driver with average <br />eyesight, nor shall such a sign interfere with the driver's operation of a motor vehicle in any way or manner. <br />3. No sign may be of such intensity or brilliance that it interferes with the effectiveness of an official traffic sign, <br />device or signal. <br />4. The person owning or controlling a sign with a dynamic display shall adjust the sign to meet the brightness <br />standards according to the city's instructions. The sign owner or operator shall adjust the sign within one hour or as soon as <br />reasonably possible upon notice of non-compliance from the city. <br />5. All dynamic display signs installed after 12-31-2008 shall be equipped and operated with an ambient light monitor <br />or a mechanism that automatically adjusts the brightness level of the sign in response to light conditions. These signs also <br />shall be equipped with a means to turn off immediately the display or lighting if the sign malfunctions, and the sign owner or <br />operator must turn off the sign or lighting within one hour or as soon as reasonably possible after the city notifies the owner <br />or operator that the sign is not meeting the standards of this chapter. <br />6. Subsequent to 11-01-2011, no dynamic display sign shall have the capacity to operate in excess of 7,500 Nits <br />