Presumptive evidence of gaming

In the case of a prosecution under the provisions of this Act or any other regulatory instrument, any person who in any way whatsoever has taken part in or has been a partner of any person in any bet or wager, and whose evidence is required in support of such charge as aforesaid, shall be compellable to answer any question respecting that charge, notwithstanding that the answer thereto will expose him to criminal prosecution; but in any such event, any person who shall have given evidence in respect of such charge, and who shall have made a true and faithful statement touching such charge, to the best of his knowledge, shall thereupon obtain from the court a certificate to that effect, and he shall, in consequence, be exempted from all criminal responsibility in respect of his participation in the bet or wager forming the subject-matter of the charge upon which he gave evidence as witness.