The minimum width of an alley shall be 20 feet, if provided.
Where a proposed park, playground, school or other public use
shown in the Master Plan or not anticipated in such Master Plan is
located in whole or in part in a subdivision, such area shall either
be dedicated to the proper public agency or it shall be reserved for
acquisition by such agency within a specified period by purchase or
other means and an agreement shall be entered into between the subdivider
and the public agency regarding the time and method of acquisition
and the cost thereof. If the Planning Board determines that a suitable
park or parks of adequate size cannot be located in any such plat
or is otherwise practical, the Board may require as a condition to
approval of any such plat such other further conditions as may be
authorized by law.