Section 14: On a prosecution-

(a) for perjury alleged to have been committed on the trial of an indictment for felony or misdemeanour; or (b) for procuring or suborning the commission of perjury on any such trial; the fact of the former trial shall be sufficiently proved by the production of a certificate containing the substance and effect (omitting the formal parts) of the indictment and trial purporting to be signed by the clerk of the court, or other person having the custody of the records of the court where the indictment was tried, or by the deputy of that clerk or other person, without proof of the signature or official character of the clerk or person appearing to have signed the certificate.