Compliance is a very thorough, one time process that your vehicle has to go through before it can be registered for the first time in NZ. They test a range of safety features on your vehicle – seatbelt restraints, tyre tread, break pads, windscreens, etc. – they strip the inside of the vehicle so that the actual structure of the vehicle can be inspected to ensure it’s never been significantly damaged, and they test the emissions that your vehicle produces. Once this process is complete you’ll be issued with a certificate of compliance and a warrant of fitness and will be able to register your vehicle. After this, you will just need to get a warrant of fitness periodically.