Evidence
3.—(1) In any proceedings under Article 22 or 24, a certificate signed by or on behalf of a Minister of the Crown or a Northern Ireland department and certifying that any conditions or requirements specified in the certificate—
(a)were imposed by that Minister or that department (as the case may be), and
(b)were in operation at a time or throughout a time so specified,
shall be conclusive evidence of the matters certified.
(2) A document purporting to be such a certificate shall be received in evidence and, unless the contrary is proved, be deemed to be such a certificate.