(1)  In any proceedings for an offence under this Act, a witness for the prosecution is not compelled to disclose the fact that the witness received information, the nature of the information received or the name of the person from whom the information was received.

(2)  An authorised officer appearing as a witness in any proceedings is not compelled to produce any document containing any confidential matter made or received in his or her capacity as an authorised officer.

(3)  Despite subsections (1) and (2) , a court hearing proceedings for an offence under this Act may order the disclosure of any matter, or the production of a document, referred to in those subclauses if the court considers that it is necessary in the interests of justice.