Homegrown at club.

It's a bit messy since I cut and pasted from a pdf document:-

Conditions for Registration: List A

17.08 No club may have more than 25 players on List A during the season. As a

minimum, places 18 to 25 on List A (eight places) are reserved exclusively

for “locally trained players” and no club may have more than four

“association-trained players” listed in places 18 to 25 on List A. List A must

specify the eight 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 VIII.

17.09 A “locally trained player” is either a “club-trained player” or an “associationtrained

player”.

17.10 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.

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 national association as that of his current club for a

period, continuous or not, of three entire seasons or of 36 months.

17.12 If a club has fewer than eight locally trained players in its squad (i.e. in places

18 to 25 on List A), then the maximum number of players on List A is

reduced accordingly. Furthermore, if a club lists a player in places 18 to 25

on List A who does not fulfil the conditions set out in this article, that player is

not eligible to participate for the club in the UEFA club competition(s) in

question and the club is unable to replace him on List A.

17.13 List A has to be submitted by the following fixed deadlines:

a) 8 July 2008 (24.00 CET): for all matches in the first qualifying round;

b) 24 July 2008 (24.00 CET): for all matches in the second qualifying round;

c) 7 August 2008 (24.00 CET): for all matches in the third qualifying round;

d) 1 September 2008 (24.00 CET): for all further matches as from the first

match in the group stage up to and including the final.

17.14 For the three UEFA Champions League qualifying rounds, after the abovementioned

qualifying dates, one player on List A may be changed until 24.00

CET on the day before the relevant first-leg match, provided that the club’s

national association confirms in writing that the new player is eligible to play

at domestic level at this time.

Conditions for registration: List B

17.15 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 24.00 CET on

the day before the match in question.

17.16 A player may be registered on List B if he is born on or after 1 January 1987

and has been eligible to play for the club concerned for any uninterrupted

period of two years since his 15th birthday by the time he is registered with

UEFA. 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.