Except as provided by
this Act, none of the following is liable to be challenged, appealed against,
reviewed, quashed or called in question in or by any court on any account
—
(a) an
act, omission or decision of an agency, or any other thing done by an agency,
under this Act;
(b) an
act, omission or decision of the Premier under Division 4 of Part 2 or under
section 77;
(c) an
act, omission, decision or proceeding of the Commissioner, or any other thing
done by the Commissioner.