1. Regulation (EC) No. 261/2004 of the European Parliament and the Council of 11 February 2004, establishing common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delays of flights - European Air Law (Update) View the chapter 1. Regulation (EC) No. 261/2004 of the European Parliament and the Council of 11 February 2004, establishing common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delays of flights by - European Air Law (Update) 1. Regulation (EC) No. 261/2004 of the European Parliament and the Council of 11 February 2004, establishing common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delays of flights