Under what condition can a penalty kick be retaken?

A penalty kick can be retaken if the ball becomes defective during the kick. This occurs when the ball experiences issues such as being punctured or deformed, which affects its playability. If the ball is deemed no longer suitable for the game, the kick is declared invalid, and the penalty must be taken again once a new, appropriate ball is introduced.

In the context of penalty kicks, if a defender moves early or the goalkeeper saves the shot, these situations typically do not justify a retake. In the case of an early move by a defender, the referee might allow the kick to stand or could enforce the kick to be redone only if the infraction impacted the outcome of the kick. A foul called by the referee, unless it pertains directly to the kick's execution or involves the goalkeeper encroaching into the area, does not provide grounds for retaking the kick either. Therefore, having a defective ball is the clear condition that mandates a retake of the penalty kick.