Two 20-minute halves, running clock, unless specified otherwise.  No Grace Period. Games start and end on time. The clock will start whether the team is ready or not. Be dressed and warmed up at least 15 minutes prior to the scheduled game.  The clock will run during player injuries, unless the official deems the injury as serious. The official may also stop the clock for other circumstances deemed appropriate.  HALFTIME. No more than 5 minutes and no less than 1 minute.  No timeouts.  Games ending in a tie will remain a tie.