Volume Two 19. Open Space 3 Zone (a) Indigenous vegetation under or within 50m of commercial forest, woodlot forest or shelter belt; (b) Indigenous vegetation dominated by manuka, kanuka, tauhinu, bracken fern and silver tussock, and which has grown naturally from previously cleared land (i.e. regrowth) and where the regrowth is less than 20 years in age; (c) Indigenous vegetation dominated by matagouri, and which has grown naturally from previously cleared land (i.e. regrowth) and where the regrowth is less than 50 years in age; (d) Where the clearance is associated with the maintenance of an existing road, forestry road, harvesting track or farm track. 19.3.3.3. Clearance of indigenous vegetation must not occur: (a) On land identified on the Threatened Environments – Indigenous Vegetation Sites; (b) On land above mean high water springs that is within 20m of an Ecologically Significant Marine Sites. 19.3.3.4. Clearance of indigenous forest must not exceed 1000m 2 per Computer Register in any 5 year period. 19.3.3.5. Clearance of indigenous vegetation, per Computer Register, must not exceed: (a) 2000m in any 5 year period where the average canopy height is 2 between 3m and 6m; (b) 10000m in any 5 year period where the average canopy height is 2 below 3m, except for the following species where clearance must not exceed: (i) 500m of indigenous sub-alpine vegetation; 2 (ii) 100m of tall tussock of the genus Chinochloa. 2 19.3.4. Non-indigenous vegetation clearance. 19.3.4.1. Vegetation must not be removed by fire or mechanical means within 8m of a river (except an ephemeral river, or intermittently flowing river when not flowing), lake or the coastal marine area. 19.3.4.2. Vegetation clearance must not be in, or within 30m of, a river within a Water Resource Unit with a Natural State classification. 19.3.4.3. Within, or within 8m of, a Significant Wetland, Pest Plants identified in Appendix 25 and willow, blackberry, broom, gorse and old man’s beard must be the only vegetation removed. Any vegetation removed under this Standard must only be cleared by non-mechanical means. 19.3.4.4. Vegetation clearance must not be within such proximity to any abstraction point for a community drinking water supply registered under section 69J of the Health Act 1956 as to cause contamination of that water supply. 19.3.4.5. Woody material greater than 100mm in diameter and soil debris must: (a) not be left within 8m of, or deposited in, a river (except an ephemeral river or intermittently flowing river, when not flowing), lake, Significant Wetland or the coastal marine area; 19 – 5