Oh no, they got me with their legal mumbo jumbo

From Sydney Morning Herald: Chaser team gets last laugh on police

Mr Cowdery said: "The evidence establishes that the Chaser's plan, in what was considered the unlikely event that they were allowed to pass through any gates, was to stop short of the restricted area and to get [Chas] Licciardello out of the vehicle.

"Police permission in fact constitutes special justification for entry."

From APEC Meeting (Police Powers) Act 2007:

(2) A person has a special justification to be in an area if:

(a) the person is a police officer who is on duty in the area, or

(b) the person is required, authorised or permitted to be in the area by the Commissioner or a police officer, or

(c) the person is required to be in (or pass through) the area for the purposes of the person’s employment, occupation, profession, calling, trade or business or for any other work-related purpose, or

Ooops.