Section 235 - Evidence of witness impeaching credit.

A witness declaring another witness to be unworthy of credit may not, upon his examination-in-chief, give reasons for his belief but he may be asked his reasons in cross-examination, and the answers which he gives cannot be contradicted, though, if they are false, he may afterwards be charged with an offence under section 191 of the Criminal Code and on conviction, shall be dealt with accordingly.