When is the ball considered out of play?

The ball is considered out of play when it crosses the goal line or the touchline, whether on the ground or in the air. This fundamental rule ensures that the game pauses for certain situations such as goal kicks, corner kicks, throw-ins, or when a goal is scored. Understanding this aspect is crucial for both players and referees, as it dictates when play can resume and what actions are permissible during those moments.

In contrast, while the referee blowing the whistle does signal an event, such as a foul or the end of a period, it is the crossing of the goal line or touchline that officially determines the ball's status. Hitting the goalpost does not affect play; as long as the ball remains in the field of play after contact with the post, it is still considered active. Additionally, a player being injured may lead to a stoppage of play, but the ball is only out of play when it has actually crossed the defined boundaries of the field.