Originally Posted by
isuzurover
YES - you have to tell QLD transport to do it legally (and take the vehicle there so they can look at it).
The story of when I did mine:
I went to my blue plater (engineer for those in other states) to get my seats mod plated - I also asked him about the ute conversion. He told me what I wrote above - no mod code exists for it so there is nothing that needs to be approved.
I then went to QLD transport (Mt Gravatt), with a completed "change of vehicle particulars" form and told them the above (1st time I didn't have the IIA with me - they told me they needed to see it). Went back, they asked me who the engineer was who told me this (gave his name and approval number). They phoned him, then they spent 45 mins on the phone to head office, making sure this was correct. Eventually, a guy comes out, says "nice truck" and that was that.
EDIT - so given my experience, it would be worth having the details of a (friendly) engineer for transport to contact.