Land Transport Act 1998, s 128E
As part of enforcing parking restrictions and other traffic rules that come within their role, parking wardens can require you to give them your identifying details and certain other information. If you’re in a vehicle, or seem to be in charge of a vehicle, they can require you to give them your full name, full address and other identifying details or, if you’re not the driver or in charge of the vehicle, to give them any information you’re aware of that would identify the driver or person in charge.
It’s a criminal offence to refuse to give that information, or to give false information. For this you can be fined up to $1,000.
If a parking warden believes on reasonable grounds that your vehicle is obstructing the road or an entrance or that it’s a safety risk or is inconveniencing the public, they can get into your vehicle and move it to a place where it won’t be a traffic hazard, or order you to move it, or authorise someone else (such as a tow-truck operator) to move it.
Note: Parking wardens don’t have any power to arrest people.