Commission decision of 20 December 2011 on the application of Article 106(2) of the Treaty on the Functioning of the European Union to State aid in the form of public service compensation granted to certain undertakings entrusted with the operation of services of general economic interest (2012/21/EU) (“SGEI Decision”), as amended Communication from the Commission on the application of the European Union State aid rules to compensation granted for the provision of services of general economic interest (2012/C 8/02) (“SGEI Communication”), as amended