 Its main shareholder is the French owned company CEA, but the German federal government also holds, through Siemens, 34% of the shares of Areva's subsidiary, Areva NP, in charge of building the EPR (third-generation nuclear reactor).In 2010, as part of the progressive liberalisation of the energy market under EU directives, France agreed the "Accès régulé à l'électricité nucléaire historique" (ARENH) regulations that allowed third party suppliers access up to about a quarter of France's pre-2011 nuclear generation capacity, at a fixed price of €42/MWh from 1 July 2011 until 31 December 2025.As of 2015, France's electricity price, excluding taxation, to household customers is the 12th cheapest amongst the 28 member European Union and the second-cheapest to industrial consumers.