Multifamily retail and subdivision sales signs. One sign shall be permitted, its purpose is to advertise the availability of rental units, subdivision lots and houses. The sign may contain information on rent levels, number of bedrooms, housing prices, financing, descriptive matter and the like. The sign shall be limited to 32 square feet in size. The sign may be located on any lot within the subdivision or multifamily project area, but shall not be located upon a public right-of-way. The sign shall be subject to the restrictions and regulations of the zoning district in which it is located. The sign shall be removed within 12 months following the completion of the subdivision development or multifamily project.