ference of the ball shall not be less than twenty-seven inches nor more than twenty-eight. The outer casing must be of leather, and no material shall be used in the construction of the ball which would constitute a danger to the players. In International matches the dimensions of the field of play shall be — maximum length, 120 yards; minimum length, 110 yards; maximum breadth, 80 yards; minimum breadth, 70 yards; and at the commencement of the game the weight of the ball shall be from thirteen to fifteen ounces.
(a) (The touch and goal lines must not be marked by a V-shaped rut.)
Duration of Play. — Choice of Goals. — The Kick-off.
2. The duration of the game shall be ninety minutes, unless otherwise mutually agreed upon. The winners of the toss shall have the option of kick-off or choice of goals. The game shall be commenced by a place kick from the centre of the field of play in the direction of the opponents' goal line; the opponents shall not approach within ten yards of the ball until it is kicked off, nor shall any player on either side pass the centre of the ground in the direction of his opponents' goal until the ball is kicked off.
(If this law is not complied with the kick-off must be taken over again.)
Changing Ends. — The Interval. — The Re-start.
3. Ends shall only be changed at half-time. The interval at half-time shall not exceed five minutes, except by consent of the referee. After the goal is scored, the losing side shall kick off, and after the change of ends at half-time, the ball shall be kicked off by the opposite side from that which originally did so; and always as provided in Law 2.
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
