(1) In any proceedings (including disciplinary action) under this Act, a certificate, signed by the Secretary, stating that a person was, at a specified time, a trade measurement inspector of a particular class is admissible as prima facie evidence of the matters stated in the certificate.
(2) A document purporting to be a certificate mentioned in subsection (1) is taken to be such a certificate and to have been duly given unless the contrary is established.