The Referees Committee appoints the referee team for each match. The host association must appoint an official timekeeper. If deemed necessary, the UEFA match delegate is empowered to use a neutral referee to act as a timekeeper at any time during the competition.
UEFA arranges for the referee team to arrive at the venue the day before the start of a mini-tournament, or two days before the final tournament. If a member of the referee team does not arrive at the venue by then, the UEFA administration and the teams must be informed immediately. The Referees Committee takes the appropriate decisions, which are final.
If a first or second referee becomes unfit before or during a match and is unable to officiate, in principle the third official replaces him. This is decided on a case-by-case basis by the UEFA administration in cooperation with the Referees Committee. Such decisions are final.