BC evidence Act section 13

"Cross examination of witnesses as to previous statements in writing

13. A witness may be cross examined as to previous statements made by him in writing, or reduced into writing, relative to the subject matter of the proceedings, without the writing being shown to him; but if it is intended to contradict the witness by the writing, his attention must, before the contradictory proof can be given, be called to those parts of the writing which are to be used for contradicting him; and the judge, or other person presiding over the proceedings, at any time during the proceedings, may require the production of the writing for his inspection, and he may after that make use of it for the proceedings as he thinks fit."