And here's an AAT decision from June this year in which the AAT affirmed CASA's decision that the applicant was not a fit and proper person:
Schott and Civil Aviation Safety Authority
I commend to you, in particular, the AAT's considerations under the heading "Fitness and propriety" starting at para 47 and the various decisions cited. I also note that the finding that the applicant was not a fit and proper person was made without the applicant having been found guilty of any offence by any court. I further note that CASA cancelled the applicant's authorisation, the AAT affirmed that decision and, therefore, no court cancelled the authorisation.