Futsal official, player and equipment

There are five players on every team, one of whom is the goalkeeper. The highest number of substitutes allowed is seven, with infinite substitutions during the match. Substitutes can come on still when the ball is in play. If a team has less than three players in the team, the match is discarded.
The match is controlled by a referee who implements the Laws of the Game, and the primary referee is the only one who can discard the match because of intrusion from outside the pitch. This referee is also aided by a second referee. The verdicts made by the referees are final, and can only be changed if the referees consider it is necessary and play has not restarted. There is also a third referee and a timekeeper, who are provided with apparatus to keep a record of fouls in the futsal match. In the event of harm to the referee or second referee, the third referee will restore the second referee.
The kit is made up of a jersey or shirt with sleeves, shorts, and socks, shin guards made out of rubber or plastic and shoes with rubber soles. The goalkeeper is allowed to wear long trousers and a diverse coloured kit, to distinguish himself from the previous players in the team and the referee. Jewellery is not approved, as are other items that could be hazardous to themselves or other players.