Laws? Have a wade through the Aviation Transport Security Regs.
I cannot imagine a police officer removing me from airside as a pilot bearing an ASIC.
I can, if you don't have a legitimate reason for being there. Just being a pilot (or anyone else) with an ASIC does not make you authorised.
From the Regs:
unauthorised person, in relation to a place or thing, means a person who:
(a) is not authorised by the owner or person in control of the place or thing to have access to the place or thing; and
(b) has no other lawful reason to have access to the place or thing.
So if the "owner or person in control of the place or thing" considers you not authorised, and since they are legally required to
...control access at the airport...
and must
...deter and detect unauthorised access into the airside area by people.....
I guess they could have you removed.
find him or herself looking for a new job in the near future.
Probably standing beside the pilot looking for a new job after his boss fired him for losing his access privileges, or for having his ASIC withdrawn for misuse.