The sport is usually played on an indoor court that is by }. At each end, there is a 'frame' (a device similar to a trampoline off which the ball bounces). This frame measures . There is also a semicircular D-shaped area measuring in radius around the frame which players can not enter. The game is played with two teams of 12 players on each team. Of the twelve players on a team, seven may be on the court at any one time. Each team can score on both ends on the field. In order to score a point, the ball must be thrown by an attacking player, hit the frame and bounce outside the 'D' without being caught by the defending team. Physical contact is not allowed, and defenders may not try to stop the attacking team's passes. Players may take three steps with the ball and can hold the ball for at most three seconds. Teams may not pass the ball more than three times before shooting at the frame.