Commission Regulation (EU) Nº 394/2011 of 20 April 2011 amending Regulation (EC) Nº 748/2009 on the list of aircraft operators that performed an aviation activity listed in Annex I to Directive 2003/87/EC of the European Parliament and of the Council on or after 1 January 2006 specifying the administering Member State for each aircraft operator as regards the expansion of the Union emission trading scheme to EEA-EFTA countries