(Telecompaper) The CEOs of nine of the major mobile operators in Europe have expressed deep concern about the EU's plans to implement the spectrum policy part of the proposed European Electronic Communications Code. In an open letter co-signed by the chief executives of KPN, Telenor, Telecom Italia, Vodafone, Orange, Telefonica, Deutsche Telekom, Telia, Telekom Austria as well as industry group the GSMA, the operators emphasised the need for clear provisions addressing the predictability of future rights, above all minimum licence duration of 25 years coupled with a strong presumption of renewal.