Originally Posted by
nomad420
My understanding is that applying a GPU/RPU (to a previously purchased ticket) under T24 is technically not allowed.... .
All that is explicitly disallowed is waitlisting under T-24
Such as here
New waitlist requests for Regional Premier Upgrades can be made until 24 hours prior to departure.
Same wording in the GPU T&Cs
People have cleared with new/old bookings when space was available for some time. It does create an inequity with those waitlisted but not clearing.