When may a coach appeal a referee's decision?

Coaches cannot formally appeal a referee's decision during a match. The Laws of the Game are clear in stating that the referee's decisions are final, and once a decision has been made, it cannot be overturned or appealed by coaches or players. This is intended to maintain the flow of the game and to ensure that the referee’s authority is respected.

In some cases, there might be discussion or clarification sought during halftime or after a goal, but these do not constitute formal appeals. The integrity of the referee's decisions is vital for the sport, and allowing appeals would lead to continuous interruptions and disputes, undermining the referee's role and authority on the field.