Before the approval by the Planning Board of a plat
showing lots, blocks or sites, with or without streets or highways,
or the approval of a plat already in the office of the Clerk of the
county wherein such plat is situated if such plat is entirely or partially
undeveloped, such plat shall also show, in proper cases and when required
by the Planning Board, a park or parks suitably located for playground
or other recreational purposes. Where a proposed park, playground
or other permanent recreation area is shown on the Comprehensive Development
Plan to be located in whole or part in a proposed subdivision, the
Planning Board shall require that such area or areas be shown on said
plat.