Common property which is privately owned. Common property is a parcel or parcels of land, a privately owned road, or roads, together with improvements thereon, the use and enjoyment of which are shared by the owners and occupants of the individual building sites. When common property exists, the ownership of such common property shall be private. When privately owned, arrangements must be made for the improvement, operation, and maintenance of such common property and facilities, including private service parking and recreational areas. This shall not be waived.