Witness not excused from answering on ground that answer will criminate
134.—(1)  A witness is not excused from answering any question as to any matter relevant to the matter in issue in any suit, or in any civil or criminal proceeding, upon the ground that the answer to such question will criminate, or may tend, directly or indirectly, to criminate, such witness, or that it will expose, or tend, directly or indirectly, to expose, such witness to a penalty or forfeiture of any kind, or that it will establish or tend to establish that the witness owes a debt or is otherwise subject to a civil suit at the instance of the Government or of any other person.
(2)  No answer which a witness is compelled by the court to give shall subject him or her to any arrest or prosecution, or be proved against him or her in any criminal proceeding, except a prosecution for giving false evidence by such answer.
(3)  Before compelling a witness to answer a question the answer to which will criminate or may tend, directly or indirectly, to criminate such witness, the court is to explain to the witness the purport of subsection (2).
(4)  Where the accused gives evidence in any criminal proceedings —
(a)the accused is not entitled to refuse to answer a question or produce a document or thing on the ground that to do so would tend to prove the commission by him or her of the offence charged; and
(b)except as regards any question, document or thing which in the opinion of the court is relevant solely or mainly to the accused’s credibility as a witness (not being, in the case of a question, one asked by virtue of section 56), the accused is not entitled to refuse to answer a question or produce a document or thing on the ground that to do so would —
(i)tend to expose the accused to proceedings for some other offence or for the recovery of a penalty; or
(ii)tend to expose the accused’s wife or husband to proceedings for an offence or for the recovery of a penalty.
(5)  Where a person being the wife or husband of the accused gives evidence in any criminal proceedings, that person —
(a)is not entitled to refuse to answer a question or produce a document or thing on the ground that to do so would tend to prove the commission by the accused of the offence charged; and
(b)except as regards any question, document or thing which in the opinion of the court is relevant solely or mainly to that person’s credibility as a witness, is not entitled to refuse to answer a question or produce a document or thing on the ground that to do so would tend to expose her or him to proceedings as mentioned in subsection (4)(b)(i).
(6)  No answer which an accused or his or her spouse is compelled to give under subsection (4)(b) or under subsection (5)(b) shall —
(a)expose the accused to any proceedings for some other offence or for the recovery of a penalty or be proved against him or her in any such proceedings; or
(b)expose the spouse to any proceedings for an offence or for the recovery of a penalty or be proved against the spouse in any such proceedings.
(7)  Any reference in this section to proceedings for the recovery of a penalty includes a reference to civil proceedings therefor.