Rule Number 41
COMPLETION OF PLAY
.1 The timekeeper will indicate the end of the period of playing time by the use of a loud signal. The ball is dead at the start of the signal. The referee shall use signal 2 to confirm the timekeeper's signal.
.2 If a goal penalty-shot has been awarded prior to the signal for completion of play, the goal penaltyshot must be taken before play is to be considered completed. In this situation, the ball shall after it has been thrown immediately be dead if it hits the water or the goal frame and comes back into the playing area.