Criminal Code (Cap. 9), article 637

637. Any objection from any of the causes referred to in articles 630, 633 and 636, shall affect only the cred ibility of the witn ess, as to which the decision shall lie in the discretion of those who have to judge of the facts, regard being had to the demeanour, conduct, and character of the witness, to the probability, consistency, and other features of his statement, to the corroboration which may be forthcoming from other testimony , and to all the circumstances of the case: Provided that particular care must be taken to ensure that evidence relating to the sexual history and conduct of the vict im shall not be permitted unless it is relevant and necessary. Production of fullest evidence available.