A protest is directed against the validity of a match result. It is based on a player’s eligibility to play, a decisive breach of the regulations by the referee, or other incidents influencing the match.
Protests concerning the state of the field of play must be submitted to the referee in writing by the relevant officials before the match. If the state of the field of play becomes questionable in the course of the match, the team captain must inform the referee, in the presence of the captain of the opposing team, orally without delay.
Protests cannot be lodged against factual decisions taken by the referee.
A protest against a caution or expulsion from the field of play after two cautions is admissible only if the referee’s error was to mistake the identity of the player.