Hi,
Technically speaking, I think that this radio has no type approval to be used for any service (amateur, private mobile radio, marine band, CB...) so it is better not to be involved in any interference issue with ACMA.
Regarding the frequency coverage... it is like driving a car capable of making 180 kph when the limit is 110.
Just keep a low profile, don't create problems, and nothing nasty will happen.

