Cross-examination as to previous statements in writing
147.—(1)  A witness may be cross-examined as to previous statements made by him in writing or reduced into writing, and relevant to matters in question in the suit or proceeding in which he is cross-examined, without such writing being shown to him or being proved; but if it is intended to contradict him by the writing, his attention must, before the writing can be proved, be called to those parts of it which are to be used for the purpose of contradicting him.
(2)  If a witness, upon cross-examination as to a previous oral statement made by him relevant to matters in question in the suit or proceeding in which he is cross-examined and inconsistent with his present testimony, does not distinctly admit that he made such statement, proof may be given that he did in fact make it; but before such proof can be given, the circumstances of the supposed statement, sufficient to designate the particular occasion, must be mentioned to the witness, and he must be asked whether or not he made such statement.
(3)  Where in any proceedings a previous inconsistent or contradictory statement made by a person called as a witness in those proceedings is proved by virtue of this section, that statement shall by virtue of this subsection be admissible as evidence of any fact stated therein of which direct oral evidence by him would be admissible.
(4)  Where a person called as a witness in any proceedings is cross-examined on a document used by him to refresh his memory, that document may be made evidence in those proceedings.
(5)  Where a document or any part of a document is received in evidence by virtue of subsection (4), any statement made in that document or part by the person using the document to refresh his memory shall by virtue of that subsection be admissible as evidence of any fact stated therein of which direct oral evidence by him would be admissible.
(6)  In estimating the weight, if any, to be attached to a statement admissible in evidence by virtue of this section regard shall be had to all the circumstances from which any inference can reasonably be drawn as to the accuracy or otherwise of the statement and, in particular, to the question whether or not the statement was made contemporaneously with the occurrence or existence of the facts stated, and to the question whether or not the maker of the statement had any incentive to conceal or misrepresent the facts.
(7)  Notwithstanding any other written law or rule of practice requiring evidence to be corroborated or regulating the manner in which uncorroborated evidence is to be treated, a statement which is admissible in evidence by virtue of this section shall not be capable of corroborating evidence given by the maker of the statement.