National Lacrosse League Rules:
Indoor lacrosse is played inside the confines of an ice hockey rink, with glass and rink boards intact. The playing surface consists of a green dieter turf carpet that is laid down over the hockey ice.
- 20-man roster, each team dresses 18 players for games (16 runners and two goalies).
- Each team has 5 runners (forwards, transition players and defensemen) and a goaltender on the floor during the game, with the players rotating on and off the floor in shifts similar to ice hockey.
- Each team in the NLL plays 18 games(9h/9a) during the regular season; Each team plays the 4 other teams in their division twice (1h/1a) and the other 10 in-conference teams once (one division will be played at home and the other will be away; alternates each year)
- The regular season begins in late December and ends in April. At the end of the regular season, the top 3 teams in each division and 1 wildcard make the playoffs to compete for the Champion's Cup.
- All NLL games are played on weekends, save for the occasional Friday night game.
- Bonus Points System:
1) 4 points for winning a game
2) 2 points for drawing a game
3) 0 points for losing a game
4) 1 bonus point for losing by 8 points (or fewer) or in overtime.
5) 1 bonus point for scoring 8 goals (or more)
- The game consists of four 15-minute quarters, with 2-minute breaks between the 1st and 2nd quarters and between the 3rd and 4th quarters (with a 12-minute break between the 2nd and 3rd quarters referred to as "half-time"); If a game is tied after regulation, the two teams play sudden death overtime periods of up to 15 minutes each where the next team to score wins the game (there are no tie games in professional indoor lacrosse).
- Face-Offs: To determine possessions at the start of each quarter and after every goal, two players face their sticks at midfield with a referee placing the ball between the heads of the sticks.
- Shot Clock: A 30-second clock begins (counting down) when a team assumes possession of the ball. The offensive team must put a shot on goal during that time or they will lose possession. If they do shoot on goal (without scoring) and recover possession of the ball (via rebound/loose ball recovery), the clock is reset for a new 30 seconds.
- 8-Second Violation: Occurs when team on offense fails to advance the ball past midfield within 8 seconds after taking possession at their end.