No sign shall be placed on any portion of an awning except the valance. The sign area is limited to a maximum of 12 inches in height on the portion of the valance that is parallel to the building face, and only when the awning complies with all applicable provisions of Sections 91.3202 and 91.3202.3.1 of this Code. Signs are not permitted on awnings with a valance above a height of 14 feet as measured from the nearest sidewalk or edge of roadway grade to the top of the valance.