Three officials on the ice – two linesmen and one referee, supervise each game. Each game also has four off-ice officials: the game timekeeper, official scorer and two goal judges.
The referees have overall supervision of the game and control over all the other officials. In the case of disputes, the referee’s judgment is final. The referee also calls the penalties and determines the goal-scorer of each goal scored. In addition, the referee drops the puck for face-offs at the start of the period and then after a goal.
The linesman is generally responsible for calling infractions of the rules, such as icing, offsides, too many men on the ice, and even handling the puck with the hands. The linesman will also drop the puck for face-offs, except for after a goal and the start of each period.