Regardless of what you might otherwise think of him, perhaps he has some sort of beef with CASA?
Nobody in their right mind registers their aircraft in Australia if they can register it elsewhere. And most can!!
I remember, some years ago, a member of the CAA/CASA board was the Chief Engineer for Kerry Packer's fleet of aircraft, up to and including a DC-8-50 --- none of them on the Australian register.
Tootle pip!!