Okay, so Y, B, M, and H will work -- but it doesn't sound like any of the web fares are applicable.

If I'm not mistaken, Elites can call 7 days in advance to book the upgrade if it's available. Has that changed recently? I know I've booked 7 days in advance for recent flights.

I'm going YQR to YUL and back, first week of Dec.

Thanks for the roundup of the applicable codes!