All foreign commercial air transport flights to and from Canada or transiting Canadian airspace are to conducted in accordance with the following procedures:

• Commercial Air Transport Service flights to and from Canada
   
• Commercial Air Transport Service flights transiting Canadian airspace or conducting technical stops at Canadian airports - aircraft registered in an ICAO Member State
   
• Commercial Air Transport Service flights transiting Canadian airspace or conducting technical stops at Canadian airports - aircraft registered in a non-ICAO Member State