Planning Area - Protection Zone, Conservation Zone, and Environmentally-Constrained Sub-Zones. New, expanded or extended public water supply systems, public wastewater collection and treatment systems, and community on-site wastewater treatment facilities are prohibited unless approved through a waiver to address a documented threat to public health and safety, for a Highlands Redevelopment Area or Takings Waiver (RMP Policies 7G1 and 7G2) or to serve a cluster development that meets the requirements of RMP Objective 2J4b.