The Ministry for the Environment has on its web site:
"An Everyday Guide to the RMA"
"An Everyday Guide to the RMA is a set of booklets to help you with everyday matters under the RMA. The booklets explain specific RMA processes, your rights, and how you can get involved. ..."
http://www.mfe.govt.nz/rma/processes-and-how-get-involved/everyday-guide-rma
A useful resource recommended by a Planning Professional who specialises in Heritage.