Technically, one can sign a bid sheet, if they are qualified.
I have done it in the past.
I had no intention of taking the job, I just wanted my name to be on the top of the list.
I'd have to double check but because we bid a route only when someone comes off it. Everyone that is a RPCD can bid the route even if they can't take it over for a while.
We've had fired guys who still got to bid because they might get their job back. I thought that was stupid but it happened. So it's not totally out of the question.