Section 12

a person is in Singapore pursuant to a request made under section 9; and

the person has made a statement in relation to the criminal matter to which the request relates or in relation to a criminal matter certified by the Attorney‑General under section 11(2)(b)(ii),that statement —

must not be admitted or otherwise used in any prosecution of the person for an offence against the law of Singapore (other than for the offence of perjury, or contempt of court, in relation to the giving of that evidence) unless the appropriate authority of the foreign country concerned consents to its being so used; but(d)may be admitted or used against him or her in any proceedings in Singapore —

for the purpose of impeaching his or her credibility; or

as evidence of any fact stated in that statement, of which direct oral evidence by him or her would be admissible,if in giving evidence he or she makes a statement inconsistent with that statement.