There are no additional rules because I don't believe any are necessary. This will allow matches to be played competitively, but in a casual atmosphere where players won't have to worry about minor technicalities. The responsibility then falls on each clan leader to ensure their own clans conduct. And since I trust each leader participating, I have no doubt that this tournament will run smoothly and without disputes. Play your matches, exhibit good sportsmanship, and most importantly, have fun.