Green area. In accordance with NJAC 7:7, Rules on Coastal Zone Management, a forest preservation area equal to 25% of the building area shall be provided. In addition to the forest preservation area, not less than 20% of the net area shall be devoted to green area, which is herewith defined to include areas not covered by residential buildings, community structures, the paved areas of streets and paved public parking areas but not submerged lands. However, lakes within a mean depth of four feet shall not be considered submerged lands up to 10% of the total area set aside for green areas.