The following verbiage is from The Amendment to the Declaration of Covenants, Conditions and Restrictions of Merrimac, which was filed and recorded with the Hamilton County Recorder's Office on May 22nd, 2007.
Section 6.6 Signs. No sign of any kind, including any "For Sale" signs, shall be nailed to any tree or attached to any street sign or fence within the Real Estate. No sign of any kind shall be displayed to the public view upon any Lot or otherwise within the Real Estate except (i) one family name sign of not more than 144 square inches in area, (ii) a temporary sign to announce an event such as a birth, milestone, party or garage sale provided that temporary sign is not displayed for a period exceeding 72 hours or (iii) a sign limited in size to 24 inches by 36 inches containing the words "For Sale" or "For Rent" indicating the name of the seller, seller's agent or lessor and phone number.