The length of play is very flexible and determined by the level of play but is usually around an hour to an hour and a half of playing time. The time is divided into two halves, with usually only a 5 minute half time. Substitutions or time-outs are not allowed. Play pauses for penalties, scores, when the ball goes out of touch. The game is not stopped for injuries until the ball is out of play. Unlike American football, play does not stop with a tackle.