C-25 - Code of Civil Procedure

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310. A party cannot impeach the credit of a witness produced by himself, but he may prove by others the contrary of what such witness has stated, or, by leave of the court, he may prove that at another time he has made statements inconsistent with his present testimony, provided, in the latter case, that the witness be first questioned upon the subject.
1965 (1st sess.), c. 80, a. 310.