In Australia, vehicle modifications are subject to the Australian Design Rules (ADR) framework, which sets out the national standards for the design, construction, and performance of vehicles.

When modifying a vehicle, individuals must ensure that the changes comply with the relevant ADRs to maintain safety, emissions, and other performance standards. The modification process typically involves obtaining approval from the relevant state or territory transport authority, and some modifications may require certification from an approved engineering signatory.

Compliance with ADRs is crucial to ensure that modified vehicles remain roadworthy, adhere to safety regulations, and do not pose risks to occupants, other road users, or the environment.