2(1)If on a complaint under section 24 or 67 it is shown that the action complained of was taken for the purpose of safeguarding national security, the industrial tribunal shall dismiss the complaint.
(2)A certificate purporting to be signed by or on behalf of a Minister of the Crown, and certifying that the action specified in the certificate was taken for the purpose of safeguarding national security, shall for the purposes of sub-paragraph (1) be conclusive evidence of that fact.