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The rules of football match are formulated and revised by international football association board (IFAB), which are the rules that regular football matches must abide by. Draw two lines perpendicular to the goal line from the inside of each goal post 16.5 meters (18 yards). These lines extend to 16.5 meters (18 yards) on the playing field and are connected with a line parallel to the goal line. The area composed of these lines and the goal line is the penalty area.
The game is divided into two halves, each lasting 45 minutes. Unless otherwise agreed by the referee and both parties under special circumstances. Any agreement to change the game time (such as reducing it to 40 minutes per half due to insufficient light) must be made before the start of the game and conform to the rules of the game.