Clubs participating in UEFA competitions must submit their player lists by specific deadlines, with two distinct categories: List A and List B. List A is limited to 25 players, requiring at least eight to be locally trained, while List B has no upper limit and includes younger players meeting certain eligibility criteria.
The rules also allow for adjustments in case of injuries, particularly for goalkeepers, and clubs can register new players during knockout stages. These regulations impact how teams manage their rosters throughout the season.