The International Air Transport Association (IATA) and the European Low Fares Airline Association (ELFAA), which represents the interests of 10 low-fare airlines from nine European countries, contested the United Kingdom’s implementation of the regulation before the High Court of Justice of England and Wales. They raised before the High Court questions concerning the validity of the regulation, in particular of the provisions relating to cancellations, delay and compensation. The High Court referred those questions to the Court of Justice of the European Communities.