(a) A permitted use located within the Planned Office District shall be allowed a maximum of two signs which may be a combination of any of the following:
(1) A wall sign shall not exceed one square foot per linear foot of the building’s front wall, with a maximum of 40 square feet allowed.
(2) A ground-mounted sign not to exceed 8 feet in height with a maximum of 32 square feet of sign area. Only one ground-mounted sign will be allowed per building. A ground-mounted sign shall be set back a minimum of five (5) feet from any front or side property line. A ground-mounted sign shall not be placed in a manner that creates a site visibility problem for vehicular traffic.
(b) Privately-owned safety, traffic control, or on-site directional signs including but not limited to "EXIT," "ENTRANCE," "CLEARANCE," "PARKING," or "NO PARKING" signs shall be permitted in the “PO” zoning district provided these signs contain no advertising consisting of words, symbols or similar graphic messages. These signs shall not be illuminated, not exceed four (4) square feet in area nor exceed a free-standing sign height of two feet.
(c) One sign may be illuminated per office structure. Flashing signs or internally illuminated signs are not permitted.