The following planning and design standards
shall be complied with, and no higher standard may be required by
the Planning Board except where it finds that, because of exceptional
and unique conditions of topography, location, shape, size, drainage
or other physical features of the site or because of the special nature
and character of surrounding development, the minimum standards specified
herein would not reasonably protect or provide for public health,
safety or welfare. Any higher standard required shall be reasonable
and shall be limited to the minimum additional improvements necessary
to protect health, safety or welfare.
Reasonable requirements for the preservation
of outstanding natural features may be specified. These include large
trees or groves, watercourses and falls, historic spots, exceptional
views and similar irreplaceable assets in which there is general public
interest.