A person must not, except for the purposes of this Act or the Royal Commissions Act 1902 , be required:
(a) to produce any document in his or her possession because of the performance of his or her functions or duties or the exercise of his or her powers under this Act; or
(b) to disclose any matter or thing of which he or she had notice because of the performance of such functions or duties or the exercise of such powers;
to a court, tribunal, authority or person that has power to require the production of documents or the answering of questions.