If:
(a) under an Act, a person's exercise of a power, or a person's performance of a function or duty, is dependent upon the person's opinion, belief or state of mind in relation to a matter; and
(b) that power, function or duty has been delegated under that or any other Act;
the delegate may exercise that power, or may perform that function or duty, upon the delegate's opinion, belief or state of mind in relation to that matter.