Heavy vehicle modifications

Modified heavy vehicles may be registered in the Northern Territory (NT) provided they conform to safety standards and are approved by the MVR.

When modifying a heavy vehicle you should consider:

If you have modified your heavy vehicle, it may have to be assessed by the MVR.

Before you apply

You will need to supply all of the following:

  • an application to modify a vehicle (483.9 kb)
  • vehicle details such as month and year of vehicle manufacture
  • additional information that will help in the assessment of your vehicle – eg:
    • photos or sketches
    • and certification documents such as engineering approval.

How to apply


Email your application form to mvr@nt.gov.au.

In person

You can submit your completed application form and other information at a MVR office.


You can send your application form and other information to:

Department of Infrastructure, Planning and Logistics
GPO Box 530
Darwin NT 0801

You will be notified in writing about the outcome of the assessment.

More information

Read more about heavy vehicle modifications (702.2 kb).

Last updated: 29 January 2018