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 (190.1 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 Transport
GPO Box 530
Darwin NT 0801

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

Last updated: 17 March 2016