Maintaining compliance standards
New Zealand and Australia have the same standards and, unfortunately, there are lots.
Worst of all, these are not free, yet people need to comply or ensure that they are aware of the issues and there is continual reference to these standards for compliance.
Some of the regulations fall under standard AS/NZS 3100:2009 and below are extracts from that. The aim of this is to ensure that the device or appliance remains safe. Appliances using a cord are subject to a test to ensure it stays connected.