The Homegrown Player Rule is a rule for UEFA competitions that was first introduced in 2006–07 season and fully enforced beginning in the 2008–09 season. On top of a maximum 25 players for List A, clubs had to designate a minimum 8 players that were trained by clubs from the same national league, with 4 of them being from the club's own youth system. The rule in turn capped a maximum of 17 foreign trained players for the club in UEFA competitions.