Thank you, Les. I'll expand on your comments.
In the course of processing visa applications, we certainly do exchange information with our two closest security partners, the RCMP and CSIS. CBSA is the hub, if you like, of the security screening process. It's where the applications come, after referrals have been made from CIC. Then it's CBSA that's responsible for compiling information, which will include open-source and classified information, and information from RCMP and CSIS, and possibly other security partners relevant to the particular circumstances of the application.
CBSA then prepares either an admissibility report or an inadmissibility report.