Each club is responsible for submitting to UEFA an A list of players (List A) and a B list of players (List B), duly signed by the club and verified, validated and additionally signed by its association. These lists must include the surname and first name, date of birth, shirt number and name, nationality and national registration date of all players to be fielded in the UEFA club competition in question, as well as the surname and first name of the head coach and first assistant coach. In addition, the lists must include confirmation by the club’s doctor that all players have undergone the requested medical examination; the club’s doctor is solely responsible for ensuring that the requested players’ medical examination has been duly performed.
No club may have more than 25 players on List A during the season. As a minimum, eight places are reserved exclusively for "locally trained players" and no club may have more than four "association-trained players" listed in these eight places on List A. List A must specify the players who qualify as being "locally trained", as well as whether they are "club-trained" or "association-trained". The possible combinations that enable clubs to comply with the List A requirements are set out in Annex H.
A "locally trained player" is either a "club-trained player" or an "association-trained player".
A "club-trained player" is a player who, between the age of 15 (or the start of the season during which he turns 15) and 21 (or the end of the season during which he turns 21), and irrespective of his nationality and age, has been registered with his current club for a period, continuous or not, of three entire seasons (i.e. a period starting with the first official match of the relevant national championship and ending with the last official match of that relevant national championship) or of 36 months. In the context of this paragraph, the season immediately preceding a player’s 15th birthday may be counted if his birthday is after the last match of the relevant national championship but before or on 30 June (winter championships) or 31 December (summer championships), and the season immediately following his 21st birthday may be counted if his birthday is on or after 1 July (winter championships) or 1 January (summer championships) but before the first match of the relevant national championship.
An "association-trained player" is a player who, between the age of 15 (or the start of the season during which the player turns 15) and 21 (or the end of the season during which the player turns 21), and irrespective of his nationality and age, has been registered with a club or with other clubs affiliated to the same association as that of his current club for a period, continuous or not, of three entire seasons (i.e. a period starting with the first official match of the relevant national championship and ending with the last official match of that relevant national championship) or of 36 months. In the context of this paragraph, the season immediately preceding a player’s 15th birthday may be counted if his birthday is after the last match of the relevant national championship but before or on 30 June (winter championships) or 31 December (summer championships), and the season immediately following his 21st birthday may be counted if his birthday is on or after 1 July (winter championships) or 1 January (summer championships) but before the first match of the relevant national championship.
If a club has fewer than eight locally trained players in its squad, then the maximum number of players on List A is reduced accordingly.
List A has to be submitted online by the following deadlines:
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23 June 2023 (24.00CET) for all matches in the preliminary round;
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6 July 2023 (24.00CET) for all matches in the first qualifying round;
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20 July 2023 (24.00CET) for all matches in the second qualifying round;
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3 August 2023 (24.00CET) for all matches in the third qualifying round;
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17 August 2023 (24.00CET) for all matches in the play-offs;
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4 September 2023 (24.00CET) for all further matches from the first match in the group stage up to and including the final.
For the qualifying phase and the play-offs, a club may register a maximum of two new eligible players on List A after the above-mentioned deadlines, provided the quota of locally trained players is respected. Such registration must be completed by 24.00CET on the day before the relevant first-leg match and the club’s association must confirm in writing that the new player is eligible to play at domestic level at this time.
If the registration of such a new player causes the number of players on List A to exceed 25, the club must remove a currently registered player to reduce the squad to 25 players again.
Each club is entitled to register an unlimited number of players on List B during the season. The list must be submitted by no later than 24.00CET on the day before the match in question.
A player may be registered on List B if he is born on or after 1 January 2002 and since his 15th birthday has been eligible to play for the club concerned for any uninterrupted period of two years, or a total of three consecutive years with a maximum of one loan period to a club from the same association for a period not longer than one year. Players aged 16 may be registered on List B if they have been registered with the participating club for the previous two years without interruption.
Each club must include at least two goalkeepers on List A and at least three in total (List A and List B combined).
With regard to the definition of a “season” to be found in Paragraph 45.04 to Paragraph 45.05 of these regulations, as far as the determination of “locally trained players” is concerned, the relevant dates to be taken into account are those of the respective national championship calendar as originally scheduled, i.e. the prolongation of a national championship calendar due to an extraordinary situation in the season 2019/20 is not taken into account. Furthermore, for the season 2020/21 the period starting with the first official match of the relevant national championship and ending with the last official match of that relevant national championship is counted as full season regardless of the start and end date due to the extraordinary situation.