Temporary nonilluminated "For Sale" or "For Rent" real estate signs and signs of similar nature, concerning the premises upon which the sign is located: for residential uses, one sign per lot, not exceeding six square feet per sign face; for business or industrial uses, one sign per lot, not exceeding 12 square feet, and, if freestanding, set back at least 15 feet from all property lines. All such signs shall be removed within three days after closing of the sale, lease, or rental of the premises.