The Referees Committee appoints a referee for each match. Only referees whose names appear on the official FIFA list of referees are eligible. The rest of the referee team is, in principle, proposed by the association of the referee, in accordance with criteria established by the Referees Committee.
Any referee or assistant referee who becomes unfit to officiate, or is otherwise incapacitated before or during a match, is replaced by another member of the referee team in accordance with the principles established by the Referees Committee.