FTO AUSTRALIA

I had mine recently clear roadworthy with Tein Super GT Wagon coilovers. The guy doing the roadworthy knows his sh*t and works on V8 supercars, and said the deal is the suspension needs to be quality gear and similar design to stock for it to pass. For example, if your car previously had separate locations for the spring and the shock (i.e. like a Commodore rear end) it won't pass roadworthy.

Adjustable spring seats are not within ADR's so they shouldn't. Good to see him using logic rather than ticking boxes

I found this Vic Roads newsletter for testers which confirms what my tester said:
https://www.vicroads.vic.gov.au/~/m...usiness and industry/testingtimesissue27.ashx

Quoting:
Most McPherson strut systems are not adjustable so another common modification is the fitting of alternative McPherson strut systems that are adjustable for ride height as can be seen in the installation shown below on an early model Commodore. This does not require a VASS approval certificate as the structural design remains unaltered.
The newsletter considers McPherson struts as a form of coilover.

Mine was complied for Australian roads with them fitted so. I would assume that to be the hardest to pass?