Ok, IF I understand your question now (lol hopefully, since I misunderstood at first) you do need a header all the way through. Again, for similar reasons. That slush pile might have dozens of mss. You want to be sure your magnificent work doesn’t get mixed up with the piece of dreck above it so you want a header with name/title keyword/page number.
Hope that helps. If not swat me one for still misunderstanding. 😉