Am I of the correct understanding that for ended (or cancelled) shows, the primary poster (highest upvoted) should be a poster from the first season of the show (as opposed to posters from later seasons of the show)?

And if the show has not yet ended (or not yet cancelled) it should be the opposite- a poster from the most recent season? (this part is already in the contribution bible)

And if I am correct how about putting this information in the contribution bible?