I'm not talking about aerodrome access in this instance.
RAAus pilot certificate is NOT a licence therefore it isn't covered by ATSR 6.55.
AVIATION TRANSPORT SECURITY REGULATIONS 2005 - REG 6.55 Exercise of privileges of flight crew licences etc
This law applies to all of Australian territory, not just the aerodromes, that's a separate issue and of course there are thousands of people who work at aerodromes who are not pilots and who have ASICs.
Leaving the aerodrome access issue aside, the point is that if your aircraft is below a certain weight you aren't required to have a security designated authorisation. It IS relevant because it is just another way that GA is made to carry the financial burden while the RA Aus people contribute nothing, because of the semantics that their flying is done on a "certificate" and not a "licence".