I'll be flying from YVR-YYZ-AUH in May and my booking (revenue) is on AC J which is a signature class flight but my outbound flight to AUH is on Etihad. I have a 2 hour layover at YYZ but I have to transfer from terminal 1 to 3. My question is will I be able to use the AC BMW transfer between terminals? Or is this service restricted to AC flights only? I called customer support and they have no clue.