The system involves a little red tape, if I can put it that way. All police departments, even those that can access confidential or highly confidential information, do not necessarily have access to the data of another police department. For example, CSIS doesn't have direct access to CRPQ or to the Sûreté du Québec data bases. They have to go through liaison officers who are appointed in each of those organizations. An official request is required in order to check whether there is any information on the individuals in question that might discredit them.
On June 10th, 2008. See this statement in context.