A fistball game is controlled by a referee, who is assisted by two linesmen.
The referee has sole decision-making power. He or she makes the final decision on all points or errors. Since the linesmen are relatively far away from the referee, he or she is also responsible for observing the sidelines on his side of the field.
The linesmen are stationed in the opposite corners of the field from the referee, and use flags to signal their calls. Their task is to make judgements on line calls, similar to a soccer linesman. The observation area of the two linesmen is dependent on which of the two teams is currently attacking and which is defending. The linesman on the attacking side is responsible for the entire sideline to the end, and therefore he or she turns to face the side line. The linesman on the defending side is level with the base line and is therefore solely responsible for observing that line. The linesmen change their observation areas as the play changes between attack and defense.
In addition to displaying off balls (flag held upwards) or good balls (flag held downwards) the referee is used to rule violations or other important game situations, such as substitutions, injuries, unsportsmanlike conduct etc.