Can a player leave the field to correct equipment and enter again without permission?

A player must receive the referee's permission to leave the field of play for any reason, including correcting equipment issues. This rule is in place to maintain control of the game and ensure player safety. If a player leaves the field without permission, it could lead to confusion regarding the game's status, and the referee would not be able to account for that player's absence accurately. Furthermore, the Laws of the Game stipulate that players must seek and obtain the referee's approval before re-entering the field, which ensures that they are allowed back in at an appropriate time and maintains the integrity of the match. This protocol helps prevent any unauthorized re-entry that could disrupt the flow of the game or provide an unfair advantage to the team.