(1) A statement made to an investigator by a person in compliance with an information requirement is admissible in evidence in any proceedings, so long as it also complies with any requirements governing the admissibility of evidence in the circumstances in question.
(2) But in criminal proceedings in which that person is charged with an offence to which this subsection applies -
(a) no evidence relating to the statement may be adduced by or on behalf of the prosecution, and
(b) no question relating to the statement may be asked by or on behalf of the prosecution,
unless evidence relating to the statement is adduced, or a question relating to it is asked, in the proceedings by or on behalf of that person.
(3) Subsection (2) applies to any offence other than -
(a) an offence under section 90(6);
(b) an offence under section 5 of the Perjury Act 1911 (false statements made otherwise than on oath);
(c) an offence under section 44(2) of the Criminal Law (Consolidation) (Scotland) Act 1995
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