Originally Posted by FlyerGoldII
Right now, the booking code for sun passes is "U" - therefore, SWUs or NA upgrades, as well as SSWUs, can be used to upgrade. If this product changes so that a B booking code is used, one would only be available to use SSWUs for upgrades.
If this is the case, then presumably they will honour the remaining coupons on the existing passes? In any event I'm not going to get concerned until the official word comes out.
DF