s 16 Examination of offenders
(1) Whenever two or more persons are charged with an offence against this Act, the Magistrate may require one or more of them to give evidence as a witness or witnesses for the prosecution. (2) Any such person who refuses to be sworn, or to answer any lawful question, shall be dealt with in the same way as witnesses so refusing may by law be dealt with by a Magistrate. (3) Every person so required to give evidence who shall, in the opinion of the Magistrate, make true and full discovery of all things as to which he is lawfully examined shall be entitled to receive a certificate under the hand of the Magistrate stating that he has made a true and full discovery of all things as to which he was examined, and such certificate shall be a bar to all legal proceedings against him in respect of such things as aforesaid.