We have, as usual, very good communication with Transport Canada, and Transport Canada is the one that provides us with a lot of the information. There are some easy ones, as you could see with Aeroflot, and the Government of Canada has given us a list of aircraft that are registered in and operated from Russia.
As you point out, Nav Canada does not have the tool to identify all aspects of the NOTAM. For example, we have no information about who is sitting in the aircraft. If there are Russians who charter an aircraft that is registered somewhere else, we count on Transport Canada to provide us with that information in order to apply the NOTAM. This is something that has, in my opinion, worked very well with Transport Canada since the issuance of the NOTAM.