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Modifications will need to be inspected and certified at an AVCAIS if it changes:

  • The performance of the vehicle
  • The vehicle in a way that makes it no longer comply with Australian Vehicle Standards

You will find information on Australian Vehicle Standards-and when modifications are not required:

If you are unsure if your vehicle modifications need to be inspected and certified contact:

For light vehicles: The Vehicles Standards team on 03) 61663263 Email:

For heavy vehicles: The NHVR 1300 696 487 or E-mail: