The Postal Services Act 1998 regulates the provision of postal services in New Zealand. It covers how postal operators are registered, how posted articles may be handled, when suspicious items can be detained and opened, and some operational rules for postal networks and public letterboxes.
For business owners, the first practical point is that this Act is not about every delivery business. It uses its own definitions for letters, postal articles, postal operators and courier services. That means your compliance position depends on the kind of service you actually provide, not just the fact that you move items from one place to another.