OK , looks like me email is doing the rounds of the various state offices so we'll be able to get the state versions of it as well .
Your email question on applicable standards for seats for vehicles that predate and postdate Australian Design Rules (ADRs)
has been forwarded on to me for comment on behalf of the Northern Territory Motor Vehicle Registry.
Where a vehicle predates an applicable Australian Design Rule (ADR), (ie where that ADR is not binding) then the requirements of the Australian Vehicle (Standards) Rules (AVSRs) must be met. That is, “A seat for a driver or passenger in a vehicle must be securely attached to the vehicle.”
In the NT, where a vehicle (that is not subject to the ADR) is to be modified using an aftermarket seat-ie where the seat is not an (Vehicle) Original Equipment Manufacturer (OEM) specification seat, then as a modified vehicle, the seats would need to comply with the requirements of the National Code of Practice – VSB5 and be approved in line with the Northern Territory modified vehicle process on a case by case basis.
Where a vehicle is subject to an ADR, and it is proposed to fit Original Equipment Manufacturer (OEM) seats or aftermarket seats, then the seats and the fitment must comply with the applicable ADRs applying to the vehicle. Where aftermarket seats are fitted, then the National Code of Practice for Light Vehicle Construction & Modification - Vehicle Standards Bulletin 14 (VSB14),is the applicable reference document.
The National Vehicle Standards Bulletins are available at the following URL:
http://www.dotars.gov.au/roads/safety/b ... index.aspx