The playing surface, the football, team composition, interchange, match timing, and how the game starts. Everything that happens before and around the contest itself.
From the shape of the ground to the pressure in the ball, from the number of players on the bench to what happens when the siren sounds — the pre-match and match-day provisions of the 2026 Laws of Australian Football govern everything a fan takes for granted.
Australian football is played on an oval-shaped grass field. Unlike the rectangular pitches of soccer or rugby, the AFL ground is an ellipse — and its dimensions can vary significantly from venue to venue. Under Law 3, the playing surface must be between 135 and 185 metres long, and between 110 and 155 metres wide.
At each end, four posts stand in a line: two tall goal posts (minimum 6 metres high, spaced 6.4 metres apart) flanked by two shorter behind posts (minimum 3 metres high, also 6.4 metres from the nearest goal post). A goal square extends 9 metres out from each goal post into the field of play. The centre square measures 50 metres by 50 metres, with a centre circle of 3 metres diameter and a 10-metre circle around it for ruck contests.
The 50-metre arcs at each end define the area within which a player receiving a 50-metre penalty is advanced. The interchange area runs along one side of the ground, where teams rotate players during play.
Law 4 specifies the football in precise terms. The ball must have a longitudinal circumference of 720–730mm, a transverse circumference of 545–555mm, and be inflated to 69 kPa. In AFL competition, the official match ball is the Sherrin, manufactured to these exact specifications. Field umpires inspect the ball before every match.
Each team fields 18 players on the ground at any one time, with four interchange players on the bench (Law 5). Before the match, each club nominates its playing squad on the official team sheet. All players must wear the same uniform with distinct jumper numbers visible from front and back.
The captain holds specific responsibilities: participating in the coin toss, choosing which end to kick to, and communicating with umpires. When the captain is off the field, the acting captain assumes these duties.
Law 6 permits one runner per team — a non-playing team official who can enter the field to deliver messages. The runner must wear a distinctive vest, may not interfere with play, and must enter and exit through the interchange area. A runner who becomes involved in play or obstructs an umpire attracts a free kick against their team.
Players can be rotated on and off the field at any time through the interchange area (Law 7). There is no limit on the number of rotations. However, a team must never have more than 18 players on the ground at any point — doing so results in a free kick against the offending team from the centre circle.
The interchange procedure is strict: the player leaving must be within the interchange area before the replacement enters the field. Law 7.3 also governs the use of stretchers — if a player is injured and cannot walk, a stretcher is permitted to enter the ground to remove them, and a replacement player may enter once the stretcher has left.
An AFL match is played in four quarters of 20 minutes of actual playing time (Law 10). "Playing time" means time-on is added for every stoppage, score, and delay — which is why quarters typically run 28 to 32 minutes of real time. A full match lasts approximately two and a half hours.
The siren ends the quarter, not the game clock. Law 10.4 specifies that a quarter ends when the siren sounds. If a player is in the act of kicking for goal when the siren sounds, the kick plays out — a goal scored after the siren counts, provided the player had legitimate possession before the siren.
Under Law 10.6, the field umpire stops the clock when a goal is scored, when the ball goes out of bounds, or when play is otherwise stopped. The 2026 Laws also contain provisions for dangerous weather: if lightning is detected within a specified radius, the umpire may delay or suspend the match until conditions are safe.
Each match (and each quarter) begins with a centre bounce (Law 12). The team winning the coin toss chooses which end to kick toward in the first quarter. After every goal, play restarts with a centre bounce.
Law 13 governs starting positions at centre bounces. Only four players from each team are permitted inside the centre square — one ruckman in the centre circle and three others. The remaining 14 players must be outside the square when the umpire bounces the ball. This rule, designed to reduce congestion, means that centre bounces are contests between small groups rather than packs.
Law 14 specifies how the umpire bounces the ball. The bounce must cause the ball to rise to a height that enables the ruckmen to contest it. If the bounce is unsatisfactory (the ball does not rise vertically, or one ruckman gains an unfair advantage from the angle), the umpire bounces again. When the condition of the ground or the ball makes bouncing impractical, the umpire throws the ball up instead.
Law 11 covers what happens when a match cannot be completed. A team that refuses to take the field, or whose players leave the ground during a match, forfeits the game. The controlling body may also declare a match incomplete if conditions (weather, safety, crowd behaviour) make it impossible to continue.
If a team is reduced to fewer than 14 players during a match — through injury, reports, or order-offs — the field umpire may declare the match forfeited. The Laws grant the controlling body discretion to confirm the result or reschedule.