How a Goal is Scored.—If Bar is Displaced.—If Ball Rebounds or Goes Out of Play.
4. Except as otherwise provided by these laws a goal shall be scored when the ball has passed between the goal posts under the bar, not being thrown, knocked on, nor carried by any player of the attacking side. If from any cause during the progress of the game the bar is displaced, the referee shall have power to award a goal if in his opinion the ball would have passed under the bar if it had not been displaced. The ball is in play if it rebounds from a goal post, crossbar, or a corner flagstaff into the field of play. The ball is in play if it touches the referee or a linesman when in the field of play. The ball is out of play when it has crossed the goal line or touch line, either on the ground or in the air.
(The whole of the ball must have passed over the goal line or touch line before it is out of play.)