Yannik
Senior Member
(1) "Host associations and clubs are responsible for order and secutrity both inside and around the stadium before, during and after matches. They are liable for incidents of any kind and may be subjects to disciplinary measures and directives unless they can prove that they have not been negligent in any way in the organisation of the match.".
(2) "However, all associations and clubs are liable for the following inappropriate behaviour on the part of their supporters and may be subject to disciplinary measures and directives even if they can prove the absence of any negligence in relation to the organisation of the match: "
- e.) “The use of gestures, words, objects or any other means to transmit any message that is not fit for a sports event, particularly messages that are of a political, ideological, religious or provocative nature will not be tolerated.
The flags were "Esteladas" so in fact there were political motives behind them.
That way UEFA stands correct, Barca could possibly however appeal against their responsibility in organizing this match, as it was on neutral ground. Not sure who is in charge there then.