Part 3 Other forms of assistance
39 Production or disclosure prejudicial to national security
(1) Nothing in any of the provisions of this Part, or any corresponding provision of an Act of the Scottish Parliament, requires or authorises the production of documents, or the disclosure of information, which would be prejudicial to the security of the United Kingdom.
(2) For the purposes of any such provision a certificate signed by or on behalf of the Secretary of State to the effect that it would be prejudicial to the security of the United Kingdom for specified documents to be produced, or for specified information to be disclosed, is conclusive evidence of that fact.
4. In accordance with article 72, a State Party may deny a request for assistance, in whole or in part, only if the request concerns the production of any documents or disclosure of evidence which relates to its national security.