Originally Posted by tomgoodman

If you could decline a green slip at any time for any reason, why wouldn't every single pilot put in a blanket green slip request? You might snag a golden trip! If the trip was a stinker, CS might have to call the whole seniority list, in order, before finally assigning it to the most junior person. (Interestingly, that's the way reserve did work long ago, when categories were very small.)