Which of the following must occur for a player to correct equipment issues?

For a player to correct equipment issues, obtaining referee approval when the ball is out of play is essential. This requirement is rooted in the rules of the game, which dictate that any changes to a player's equipment—such as fixing a jersey, adjusting shin guards, or changing footwear—must be done when the game is halted.

When the ball is out of play, the referee can ensure that the player's equipment meets the required standards for safety and compliance with the laws of the game. This process helps maintain the flow and integrity of the match. Players cannot rectify equipment concerns while the game is in progress, as it could disrupt the game or provide an unfair advantage.

In contrast, checking equipment with a coach may provide some guidance but does not fulfill the requirement of referee oversight. Leaving and re-entering the field at any time is not permissible if it violates the protocol set for substitutions or equipment corrections. Similarly, changing equipment directly on the field without prior approval from the referee is not allowed, as it could lead to confusion or unfair play. Therefore, getting the referee's approval while the ball is out of play is the correct and necessary action for addressing equipment issues effectively.