Except as provided hereunder, the developer shall be required to gain the prior approval of the Land Use Board if, after approval of the general development plan, the developer wishes to make any substantial variation in the location of land uses within the planned development or to substantially increase the density of residential development.

Except as provided hereunder, once a general development plan has been approved by the Land Use Board, it may be substantially amended or revised only upon application by the developer approved by the Land Use Board.