15Confidentiality of information
(1)Information obtained by a Commissioner or his officers in the course of or for the purposes of an investigation shall not be disclosed except—
(a)for the purposes of the investigation and any report to be made in respect of it,
(b)for the purposes of any proceedings for—
(i)an offence under the Official Secrets Acts 1911 to 1989 alleged to have been committed in respect of information obtained by virtue of this Act by a Commissioner or any of his officers, or
(ii)an offence of perjury alleged to have been committed in the course of the investigation,
(c)for the purposes of an inquiry with a view to the taking of such proceedings as are mentioned in paragraph (b), or
(d)for the purposes of any proceedings under section 13 (offences of obstruction and contempt).
(2)Neither a Commissioner nor his officers shall be called on to give evidence in any proceedings, other than proceedings mentioned in subsection (1), of matters coming to his or their knowledge in the course of an investigation under this Act.