From the start of the 2006-07 season clubs must include four home-grown players in their 25-man squads with the figure rising to six in 2007-08 and eight in 2008-09.
UEFA defines home-grown players as those who have been trained by their clubs or by another club or national academy in the same country for at least three years between the ages of 15 and 21.
Keeping in line with European Union law, the nationality of the players is irrelevant
So for 07/08 - Brown, Brown, Wilson, McManus, Caldwell, McGeady, Bjarnason, Kennedy, O'Dea, Sheridan etc all qualify as home grown.