Prior to approval of any subdivision of any tract 2 acres or greater in size or Tier 2 or Tier 3 site plan for a parcel 2 acres or greater, tree conservation areas must be provided in accordance with the requirements of this UDO, provided that delineation of tree conservation areas for a site subject to either condemnation or the threat of condemnation shall be delayed until a Tier 2 or Tier 3 site plan or further subdivision of the parcel first occurs.