WarrenB1

This might be helpful, only a guideline though.
My experience in Canada, you as an interviewer would ask whether a candidate is eligible to work in Canada, if NO, stop right there or if you REALLY like the guy, offer him the job and get him to apply for the permit; if YES, pass the ball to HR, HR should be responsible to verify all work related documents including the work permit for foreigners, once everything checked, offer the job. This should apply in most Canadian banks.
Generally it is a very easy and fast process to get a work permit with or without an offer, if the candidate is qualified.