Originally Posted by Doc Fraud
I thought B inventory was always used as the basis for seat availability, but that on a flights booked with a pass, a SWU was usuable for the UG.
DF
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.