A. 
In the OS Zone, no sign shall be permitted other than as provided in Chapter 19.904 or as shown on a site plan approved under a procedure provided under this Title. Any such approval shall be limited to the minimum signing necessary to the permitted use and shall be consistent with the open space character of the site and surrounding area.
B. 
In the OR Zone, in addition to signs permitted by Chapter 19.904, 1 ground sign shall be permitted for each street frontage. Each such sign shall have not more than 2 sign faces, and each sign face area shall not exceed 200 square feet. No sign structure shall be more than 20 feet high.
C. 
The property address shall appear in minimum 8-inch high letters on all ground signs, to be illuminated and visible to the public and emergency vehicles.
D. 
In the open space zones, no sign shall be located in any vision clearance area adjacent to a driveway (as defined in Section 19.636.020), but permitted signs may be located in other required yards and open spaces.