Just in terms of length of sentence and how that impacts on treatment, it's important to understand that if a person gets a provincial sentence, which is anything up to two years less a day, the judge also has the discretion to add a period of probation, and in the case of sex offenders almost always does, up to three years.
What that means is that in addition to the time they're incarcerated when they can get treatment, there's a three-year period in which treatment can be mandated and where the rule is that if they don't take treatment they can be charged with breach of probation and get additional jail time.