Under certain circumstances and depending on the vehicle type, a vehicle may not need to be registered.
These include:

• agricultural equipment - vehicles without automotive power built to perform agricultural tasks off road such as, cultivating land, growing and harvesting crops and rearing livestock.
• trailers carrying harvester combs
• bulk field bins for holding grain
• bulk fruit bins
• trailers (other than trailers specifically built to carry a boat) that is not used in the course of trade and:
  - weighs less than 200 kilograms empty
  - is not wider than the vehicle towing it
  - is not more than 3 metres long including the drawbar and any load on the trailer
• trailers that are being towed by a registered tow truck
• motor vehicles being towed on a highway

There are vehicles that are not considered to be motor vehicles by law and therefore are also not required to be registered.