Office, Research, Industrial. No sign on any structure shall exceed 50 square feet. Total exterior sign area shall not exceed the equivalent of 5% of the first story portion of the wall to which it is attached. One use shall be permitted no more than one sign for each street frontage. Buildings with multiple uses shall have not more than one sign per use and the aggregate area of all signs does not exceed the maximum area permitted for each street frontage.
In addition, one free-standing monument sign shall be permitted around the base of the building, giving address, building name, owner and/or major tenants, which shall not exceed 50 square feet. All signs shall be externally illuminated or halo type.