Regulations of the UEFA Champions League, 2011/12 competition
Article 22 Yellow and red cards 22.01 As a rule, a player who is sent off the field of play is suspended for the next
match in a UEFA club competition. The Control and Disciplinary Body is
entitled to augment this punishment. For serious offences the punishment
can be extended to all UEFA competition categories. 22.02 In case of repeated cautions:
a) before the group stage, a player is suspended for the next competition
match after two cautions in two different matches, as well as after the
fourth and sixth caution;
b) from the first match in the group stage, a player is suspended for the next
competition match after three cautions in three different matches, as well
as following any subsequent odd-numbered caution (fifth, seventh, ninth,
etc.). 22.03 Single yellow cards and pending suspensions are always carried forward
either to the next stage of the competition or to another club competition in
the current season. 22.04 Exceptionally, single cautions and pending yellow-card suspensions expire
on completion of the play-offs. They are not carried forward to the group
stage. 22.05 Cautions and pending yellow-card suspensions from club competition
matches expire at the end of the season.