 With regard to the transmission of data to Eurostat, the new codes entered into force by 1 January 2012.Following the Kallikrates territorial reform, the NUTS regions of Greece were redefined.With the region of Epirus being reclassified as part of Voreia Ellada ("Northern Greece", former EL1), and the region of Thessaly in exchange going to Kentriki Ellada ("Central Greece", former EL2), new NUTS1 codes have been assigned to both regions.