Futsal

The two most important governing bodies of futsal are the Asociación Mundial de Fútsal (AMF) and Fédération Internationale de Football Association (FIFA). AMF is the successor organization to the original governing body. FIFA later took an interest in futsal. However, talks between FIFA and AMF to reconcile governance were not successful. FIFA organizes its own separate competitions.

There are currently two governing bodies: Asociación Mundial de Fútsal (AMF) and Fédération Internationale de Football Association (FIFA) which are responsible for maintaining and regulating the official rules of their respective versions of futsal.

Many of the laws are similar or identical to those found in association football, or reference association football in their absence (such as a section noting that there is no offside infraction in futsal.)

minimum 25 m × 16 m (82 ft × 52 ft), maximum 42 m × 25 m (138 ft × 82 ft).
Ages 13 and up: Size 4, circumference 62–64 cm (24–25 in), weight between 400–440 g (14–16 oz) at the start of the game.
There are two periods of 20 minutes with time stopping at every dead ball. Between the two periods there is a break of 15 minutes. Each team may use one time-out per half, which lasts one minute. Some leagues and tournaments use 25 minute periods with running time.
There are five players for each team in the field, one of them as goalkeeper, and a maximum number of 12 players that can be used each match. Substitutions are unlimited and on-the-fly.
All direct free kicks count as accumulated fouls. A direct free kick is awarded for kicking, tripping, charging, jumping, pushing, striking, tackling, holding, spitting, and deliberate handling. Indirect free kicks, such as playing dangerously and impeding, do not count as accumulated fouls. A team is warned by the referee when they commit five accumulated fouls in a half. All accumulated fouls after the warning result in a direct kick from the second penalty mark.
Taken from the spot of the infringement or on the line of the penalty area nearest the infringement (indirect only). All opponents must be at least 5 m (16 ft) away from the ball. The kick must be taken within four seconds or an indirect kick is awarded to the other team.
Awarded when a team commits 6 or more accumulated fouls in a half. Second penalty mark is 10 m (33 ft) from the goal, opponents must be behind the ball, goalkeeper must be at least 5 m (16 ft) away.
6 m (20 ft) from the center of the goal for fouls inside the 6 m (20 ft) goal keeper's area.
When in possession of the ball, the goalkeeper has 4 seconds to get rid of the ball. If the ball is kept too long, the referee will give an indirect kick to the other team. The goalkeeper may play freely when in the opponent's half.
Once the goalkeeper has released the ball either by kicking or throwing, the goalkeeper may not touch it again until the ball goes out of play or is touched by an opponent. The sanction for violation is an indirect free kick. The goalkeeper may receive the ball freely when on the opponent's half.
A kick-in is used instead of a throw-in. The player must place the ball on the touchline or outside but not more than 25 cm (9.8 in) from the place the ball when out of play. The ball must be stationary and the kick-in must be taken within 4 seconds from the time the player is ready. During kick-in, opponents must stand at least 5 m (16 ft) from the ball. If four seconds elapses or an illegal kick is taken, the referee will award a kick-in to the other team. It is not allowed to score directly from a kick-in: the goal is valid only if someone else touches the ball before it enters in goal.
A goal clearance is used instead of a goal kick. The goalkeeper must throw the ball with their hands and it must leave the penalty area within four seconds. If goal clearance is taken illegally the goalkeeper may retry, but the referee will not reset the count. If four seconds elapses, the other team gets an indirect kick on the penalty area line.
The ball must be placed inside the arc nearest to the point where the ball crossed the goal line and the opponent must stand on field at least 5 m (16 ft) from the corner arch until the ball is in play. The corner kick must be taken within 4 seconds of being ready or else a goal clearance will be awarded to the other team. The ball is in play when it is kicked and moves.
For international matches, there must be two referees: one (first referee) is positioned on the touchline near the timekeeper table and communicates with the timekeeper, while the other (second referee) is in the opposite side of the field. At the timekeeper table there is a timekeeper and a third referee, who controls the teams' benches. In minor events, the third referees and the timekeeper are not used.

Any standard team handball field can be used for futsal, including goals and floor markings.

A direct free kick can be awarded to the opposing team if a player succeeds or attempts to kick or trip an opponent, jumps, charges or pushes an opponent, or strikes or attempts to strike an opponent. Holding, touching or spitting at an opponent are offenses that are worthy of a direct free kick, as are sliding in to play the ball while an opponent is playing it or carrying, striking or throwing the ball (except the goalkeeper).

These are all accumulated fouls. After five accumulated fouls in a half, the sixth accumulated foul and beyond result in a direct kick from the penalty mark where members of both teams may not make a wall prior to the kick.