Queensland Consolidated Acts Queensland Consolidated ActsWhere in proceedings of whatever nature before any court, justices, tribunal, or in any inquiry, examination or arbitration it is relevant to prove—
(a) any matter related to an inquiry pursuant to a commission; or
(b) the taking of any step by a person purporting to act pursuant to any power or authority conferred by this Act;
a certificate purporting to be that of the chairperson of the commission or of a deputy to the commission as to such matter or the taking of such step shall, upon its production in the proceedings, be evidence and, in the absence of evidence to the contrary from a source other than the chairperson or deputy, conclusive evidence of the matters contained in the certificate.