Land within the Very-High Density Restricted Area PRO zone (only in area of construction) shall be in single ownership or single control in order to provide for integrated development. The area proposed for the PRO shall be in one ownership or control during design and construction to provide for full supervision and control of said development, and to insure conformance with these provisions and all conditions imposed upon the preliminary and final development plans. Individual ownership, partnerships, corporations, and other legally recognized entities are acceptable.