Certainly was the case for a previous operator in Tas.
I have no idea where you guys come up with this stuff. Wrong again, never needed a cox ticket for the previous operator, in fact he employed plenty without a basic boat license.
There is no CASA requirement for a boat license, there is no insurance requirement for a boat license and MAST (tassies boat mob) have never been known to police the issue. MAST do verbally state a boat license is necessary but would not be capable or interested in policing the matter.