42Acts done to safeguard national security, etc.
(1)This Act shall not apply to an act done for the purpose of safeguarding national security or of protecting public safety or public order.
(2)A certificate signed by or on behalf of the Secretary of State and certifying that an act specified in the certificate was done for a purpose mentioned in subsection (1) shall be conclusive evidence that it was done for that purpose.
(3)A document purporting to be a certificate such as is mentioned in subsection (2) shall be received in evidence and, unless the contrary is proved, shall be deemed to be such a certificate.