For each round of the competition in which an association is participating, it must provide the UEFA administration with a final list of 20 players (surnames, first names, club and date of birth) as well as the surname, first name and coaching qualifications of the head coach and assistant coach. Two of these 20 players must be goalkeepers. In addition, this list must include the confirmation by one of the national association's doctors that all players have undergone the requested medical examination. This list must be completed online by 12.00CET the day before a team's first match in the relevant mini-tournament or by 24.00CET two days before a team's first match in the final tournament. Amendments to this list are not allowed after this deadline with the exception of Paragraph 40.04.
For age and identity verification purposes, printed and signed copies of the final lists of 20 players and the players' passport/identity cards must be handed to the UEFA match delegate at the tournament organisational meeting the day before the start of each mini-tournament. For the final tournament, a printed and signed copy of the list and each player's passport/identity card must be handed to the UEFA match delegate or a representative of the UEFA administration by the time determined by the UEFA administration and communicated to the teams at the final tournament workshop.
For identification purposes, a UEFA representative makes a visual check of each player participating in the competition. As a rule, one such visual check takes place at a mealtime at the teams’ accommodation before a team's first match in each mini-tournament and the final tournament.
If any listed outfield players or goalkeepers named on the final list of 20 players become seriously injured or ill, they may be substituted as follows:
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One outfield player may be replaced no later than three hours before the start of the team’s first match in the final tournament. That player can take no further part in the final tournament and no other outfield player may be replaced during the final tournament.
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Goalkeepers may be replaced at any time before the start of a match.
These substitutions are permitted only upon submission of written medical evidence by the team doctor to the UEFA match delegate in one of UEFA's official languages.
All official player lists are published by the UEFA administration.
The associations are responsible for ensuring that the aforementioned provisions concerning player eligibility and lists of players are observed.