Just a short note to let people know that when it comes to IRROPS, Premium Economy will get rebooked into J if there is no PE available. I was booked on AC006 (HND-YYZ on 788) a week ago, when I got notified that the flight would be delayed by about six hours. I called AC (Skype ...) and the agent told me there were no seats on NRT-YYZ that day, but she found availability through YYC. Then I thought to ask what class I would get seated on: she thought Y, but fortunately she checked with a supervisor who confirmed that it should rebook to J. Once we knew that, she was then able to secure me one of the remaining seats on NRT-YYZ and I could get home at the scheduled time.