(2)Commission Decision 2011/121/EUnote set Union-wide performance targets, including a cost-efficiency target for the provision of air navigation services for the years 2012 to 2014. By letters of 19 July 2012 and 17 December 2012, the Commission informed the Member States that their revised performance plans and targets are consistent with, and adequately contributing to, the adopted Union-wide performance targets. Cost-efficiency targets are expressed in terms of determined unit rates.