Section 6.10. Signs. No sign or other advertising device of any nature shall be placed upon any Lot except as may be provided herein and except for the usual and customary real estate broker signs advertising a Lot as "for sale". The Association may, in its discretion, adopt and promulgate rules and regulations relating to signs. The Association may remove nonconforming signs upon three (3) days' notice to the Owner, such removal to be at the cost of said Owner.