A new Queue Re-Entry Pass is now available for those waiting in the queue for Avatar: Flight of Passage. In the event a guest needs to leave the line to use the restroom, they can locate a Cast Member who will give them a lanyard with the pass attached.
However, the rest of your party must remain in line. Once the guest returns, they are allowed re-enter through the FastPass line and then wait in a holding area until your party arrives at the location where the FastPass and standby lines merge.
The pass says it is valid for one guest only, but it’s not clear if more than one person in the party could be issued a pass (which would be necessary in a situation where a child is too young to go to the bathroom alone.)
The new pass has many speculating that this pass is a test run for a system that could be implemented when Millennium Falcon: Smugglers Run opens this August.