US jumpseat policy is about as clear as mud but it has to be that way since so many people got their finger in the policy. The bottom line for jumpseat policy is clear, no jumpseater will be given a seat in the cabin until after ALL non-revenue passengers have been accommodated. So, a gate agent may have to go through a long list of who can, who can't, who can bump who out but in the end, the exercise is really over who will occupy the actual, real, genuine jumpseat. After that is decided, the jumpseat line forms at the end of the non-rev line.