i see 2 problems with australian roads/law enforcement.
1: in NSW at least, there is no ultimate authority.
you get your car engineered, take reports to the RTA, they say, "no worries", put it in their system, all good.
get pulled over by the cops. "nah, still think its a defect, get it checked anyway."
so get it checked again, still all good.
and around and around it can go.....
2: we have ADR rules that all cars must comply too.
why dont we have australia wide rules for engineering?
that way, you would know the rules, if your car is engineered, you should be ok no matter where you travel in our great country...
my 2 cents anyway.