Originally Posted by
PAL62V
My understanding from the website highlighted earlier is that non-residents have no issues leaving and need no permission. Apparently border control can check your movements quite quickly to prove you haven't lived in Oz for a length of time. Also, I travel with both Aust and UK passports.
Regardless, you wouldn't be able to enter or leave Australia on the British Passport
Yes - Immigration can see dates and times of all entries and exits of the country