Originally Posted by
fakecd
And to add to this: say if you had priority tag and you are entitled to new one, they will STILL remove the old tag and re-attach a brand new priority tag... i think that's waste of resources.
Actually I have found the latter depends on the outstation.
For example in PVG, I have found they don't remove the old priority tags, but they do attach a new one. At one point, I think I had six of them before I decided it looked a bit ridiculous and I cut them all off.
Also from what I can tell the baggage tag itself (the one with the barcode) is encoded with your priority information.