Sorry, I misstated, I was planning to use 2 GUCs on the trip, one for outbound, one for inbound. By entire trip, I meant JFK-NRT-SIN all the way in one direction, and another GUC for SIN-NRT-JFK. What I was told was that if I went ahead and cleared myself on the segments that had the inventory, I would have to use another GUC in a given direction if the other upgrade cleared later.