"Well by law you need to have someone champion you who you think can defeat the one who claimed you first in a duel." Sirius sighed "If your champion wins, you have 28 days to finalize the marriage. Anyone else elegible, and there are quite a few criteria, can try to defeat your champion during that time in a duel, but must give a 48 hour warning. Therefor most would marry their champions, if they win, before those first 2 days are over so no one else can try to duel him for you."