For you info ….. DoC have published some policies that may be of interest – here are the links:
General Policy for National Parks 2005
This General Policy provides guidance for managing national parks – the jewels of New Zealand’s public conservation lands. It replaces the General Policy for National Parks 1983.
http://www.doc.govt.nz/About-DOC/Policies-Plans-and-Reports/General-Policy-for-National-Parks-2005/index.asp
Statement of Conservation General Policy
The policies set out in this statement will guide conservation management for the next decade or more.
http://www.doc.govt.nz/About-DOC/Policies-Plans-and-Reports/Statement-of-Conservation-General-Policy/index.asp