Just curious, which state? as I suspect the rules have indeed changed.
As an FYI, I was considering down grading the wheels from 20x9 rear & 20x8.5 front to 19x8 on both front and rear so I can rotate tyres and a slightly more comfortable ride. But even though the later wheel combo is available in SS variant, it’s not compliant on my Motorsport so I can’t use them. I also can’t modify it myself since reducing rim width is illegal and this engineering compliance must do ESC/ABS tests. It’s a little absurd as DOTARS and rego clowns agree that putting **** 20x9 rubber would likely have a bigger impact than putting 19x8 rims with good rubber but them are the rules
To make it worse, the idiot dealers who put 20” staggered rims on variants that didn’t come with such are also technically not compliant according to DOTARS but to date the rego authorities have been turning a blind eye to such practices. The day may come, just like the 4WD lift saga, the state authorities may change their tune and start to defect vehicles as they strictly follow what is defined in the RVD
So that sad day is already here, now
Until the RTA changes their mind as occurred in Queensland & WA where modern ECS vehicles with validly modified 50mm lifts were being defected and taken off the road... initially including interstate vehicles which is not much fun when on holidays as some found out. You can google it should be want to read about the absurdities of a bureaucracy
Sadly the courts can only apply the law which states vehicles must comply with ADR and certified through DOTARS. Legislators either need to change the law or administrators need to provide better guidance to the states if the law allows. Either case, it will take years to sort out and we’ll never get the freedoms we had in the pre ABS days.