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14c. 36

(2) The duty to conﬁrm or deny does not arise if, or to the extent that, compliance with section 1(1)(a) would involve the disclosure of any information (whether or not already recorded) which falls within subsection (1).

23.—(1) Information held by a public authority is exempt information if it was directly or indirectly supplied to the public authority by, or relates to, any of the bodies specified in subsection (3).

(2) A certificate signed by a Minister of the Crown certifying that the information to which it applies was directly or indirectly supplied by, or relates to, any of the bodies specified in subsection (3) shall, subject to section 60, be conclusive evidence of that fact.

(3) The bodies referred to in subsections (1) and (2) are—
 * (a) the Security Service,
 * (b) the Secret Intelligence Service,
 * (c) the Government Communications Headquarters,
 * (d) the special forces,
 * (e) the Tribunal established under section 65 of the Regulation of Investigatory Powers Act 2000,
 * (f) the Tribunal established under section 7 of the Interception of Communications Act 1985,
 * (g) the Tribunal established under section 5 of the Security Service Act 1989,
 * (h) the Tribunal established under section 9 of the Intelligence Services Act 1994,
 * (i) the Security Vetting Appeals Panel,
 * (j) the Security Commission,
 * (k) the National Criminal Intelligence Service, and
 * (l) the Service Authority for the National Criminal Intelligence Service.

(4) In subsection (3)(c) “the Government Communications Headquarters” includes any unit or part of a unit of the armed forces of the Crown which is for the time being required by the Secretary of State to assist the Government Communications Headquarters in carrying out its functions.

(5) The duty to confirm or deny does not arise if, or to the extent that, compliance with section 1(1)(a) would involve the disclosure of any information (whether or not already recorded) which was directly or indirectly supplied to the public authority by, or relates to, any of the bodies specified in subsection (3).

24.—(1) Information which does not fall within section 23(1) is exempt information if exemption from section 1(1)(b) is required for the purpose of safeguarding national security.

(2) The duty to confirm or deny does not arise if, or to the extent that, exemption from section 1(1)(a) is required for the purpose of safeguarding national security.