Moderator, Air Canada; FlyerTalk Evangelist
Join Date: Feb 2015
Location: YYC
Programs: AC SE MM, FB Plat, WS Plat, BA Silver, Marriott Plat, Hilton Gold, Accor Gold
Posts: 18,943
The T&Cs of the North America version of the pass just say "Flight credit bookings are subject to availability of the Business Class fare option", which should mean you can book anything up to J.
That would certainly help the ability to use it for last-minute bookings, which is the only way I can see this thing offering competitive value.