sentences:  'Permanent timber production zone land' (PTPZ or PTPZL) is crown land managed by Sustainable Timber Tasmania as defined in the "Forest Management Act 2013".Crown land may be classified as PTPZ (or have PTPZ classification revoked) pursuant of approval by both Houses of Parliament.PTPZ land is primarily for the purposes of wood production; specifically, activities undertaken include native forest harvesting/reforestation, plantation harvesting, road and quarry construction.