Effect of certificates.

1 This section applies where in any proceedings— a a person claims that an act discriminated against him in contravention of section 24 or 76; and b the person against whom the claim is made proposes to rely on a certificate purporting to be signed by or on behalf of the Secretary of State and certifying— i that an act specified in the certificate was done for the purpose of safeguarding national security or protecting public safety or public order; and ii that the doing of the act was justified by that purpose. 2 The claimant may, in accordance with rules made under section 91 , appeal against the certificate to the Tribunal, that is to say, the tribunal established under section 91. 3 If on an appeal under subsection (2) the Tribunal determines— a that the act specified in the certificate was done for the certified purpose; and b that the doing of the act was justified by that purpose, the Tribunal shall uphold the certificate; in any other case, the Tribunal shall quash the certificate. 4 If— a the claimant does not appeal against the certificate; or b the certificate is upheld on appeal, the certificate shall be conclusive evidence of the matters certified by it. 5 In this section “ act ” does not include the making, confirmation or approval of a provision of subordinate legislation.