On 12 March 2007 the European Commission released an independent evaluation of the impact of the Single European Sky legislation in the air traffic management performance carried out by the Eurocontrol Performance Review Commission (EPRC). The evaluation will assist the Commission in the preparation of the first report on the implementation of the Single European Sky due in April 2007. The EPRC recognises that efficiency remains a major issue. Inefficiencies in the current air traffic management system, such as low productivity and high fragmentation of air traffic management systems, cost airspace users some EUR 3 billion per year. The evaluation concludes that future efforts should focus on the development, under the existing Single European Sky framework, of non-regulatory actions such as guidance material, support to national supervisory authorities and facilitation of cooperation between parties, without necessarily introducing new legislation.