What must a player do before taking a penalty shot?

Before taking a penalty shot, the player must wait for the referee's signal. This is crucial as the referee's signal is the official indication that the player is permitted to proceed with the penalty kick. It ensures that all players are ready and that the game is being conducted fairly and according to the rules. The signal also maintains proper timing and control of the game, allowing the goalkeeper and the shooter to be in their respective positions before the kick is taken.

Waiting for the referee’s signal is essential in upholding the integrity of the game, as kicking the ball before the signal can result in the kick being deemed invalid or result in a player being penalized for encroachment, impacting the flow and fairness of the match.