Where any affidavit relating to the reproduction of a document is not an affidavit referred to in section 113 (2) , a copy thereof duly certified to be a true copy—
(a) in the case of an affidavit in the custody of a body corporate—by the chairperson, secretary or by a director or manager thereof; or
(b) in any other case—by a justice of the peace;shall, unless the court otherwise orders, be admissible in evidence in a proceeding as if it were the affidavit of which it is certified to be a true copy.