Folks,
You can argue all you like, but the reality is that, like much other aviation regulation in Australia, ( and Australian Cth regulation generally) CAR 206 means whatever some CASA perX decides it means, for whatever purpose at the time some poor sod has become a CASA target.
CASA "enforcement" is and has always been very selective and seldom related to "Safety Is Our First Priority".
There is no dissection and analysis of CAR 206 that will yield a definitive answer.
As I said in a previous post, as far as I know, Australia is the only country that defines all of aviation as (for what of a better word) commercial, then defines "private" as an exception ---- which is generally typical of our aviation rules, written in the negative, then all the exceptions.
Tootle pip!!