Variable Lot Size Provision. In a subdivision application, variable lot sizes may be approved by the Planning Board. The lot sizes may be varied to the extent lots may have areas of not less than 65,340 square feet each and a width of not less than 200 feet, the total of both side yards shall be at least 75 feet (no side yard shall be less than 25 feet), and further provided that the average lot size will be not less than three acres in size. The Planning Board, in passing on such plats, shall consider the physical and structural characteristics including topography, floodplain, wetland and I-78 environmental impacts on the land included in the subdivision and determine that such variation in lot size will provide a superior layout of the subdivision and a better use of the land for building sites than would be obtained from a uniform lot size. The subdivider shall submit a map showing the development according to the requirements of the CR-130/65 zone, as shown in Section 16-8, and another map showing the development as modified in accordance with this subsection. In no event shall the density of development throughout the subdivision exceed the exact number of lots that would have been permitted to be built if such development had proceeded on the basis of three acres per lot with a width of not less than 150 feet.