138Disclosure by witnesses

138 Disclosure by witnesses (1) In a proceeding for an offence against 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 a proceeding is not compelled to produce any document containing any confidential matter made or received in the authorised officer’s capacity as an authorised officer. (3) Despite subsections (1) and (2), a court hearing a proceeding for an offence against this Act may order the disclosure of a matter or the production of a document mentioned in subsection (1) or (2) if the court considers that it is necessary in the interests of justice.