I started a checklist for rules a moderator may want to consider for their tourney in another thread, but I thought it deserved it's own.
-minimum reputation and/or experience
-start time limit, typically 10 mins for a flash tourney, from time of availability, or from time that your opponent complains to the TD, or that the TD notices. message all parties with the 'date' command output.
-move time limit. I really hope we don't have to get into this, but I'll put it here for completeness.
-players must not blind or gag any of the TD at any time during their participation in the tournament (from registration to elimination or finish of the championship).
-all decisions of the TD are final and not subject to debate. (for me, I go with reputation as a tie-breaker in making these decisions.)
-crawford rule on