New Zealand isn't a party to that WIPO treaties [1], but it does have a law implementing restrictions on circumventing Technological protection measures (TPM) [2]. But unlike the DMCA, the NZ law lists lots of exceptions that allow you to circumvent TPMs. In fact it says "Nothing in this Act prevents any person from using a TPM circumvention device to exercise a permitted act under Part 3." Part 3 of the Copyright 1994 [3] is the (very long) part that lists everything you can do with a copyrighted work, including the NZ equivalent of fair use, research, education, archiving, backup, decompiling software, etc, etc.

[1] http://www.copyright.org.nz/international.php

[2] http://www.legislation.govt.nz/act/public/2008/0027/latest/D...

[3] http://www.legislation.govt.nz/act/public/1994/0143/latest/D...