Opinion of the Committee of the Regions on: the ‘Communication from the Commission to the Council and the European Parliament – Action programme on the creation of the Single European Sky’; the ‘Proposal for a Regulation of the European Parliament and of the Council laying down the framework for the creation of the Single European Sky’; the ‘Communication from the Commission to the Council and the European Parliament on the creation of the Single European Sky’; the ‘Proposal for a Regulation of the Europ