Letter of notification by the European Union to the Principality of Liechtenstein of technical amendment, by reason of the accession of Bulgaria and Romania on 1 January 2007 and of Croatia on 1 July 2013 , to Annex I to the Agreement between the European Community and the Principality of Liechtenstein providing for measures equivalent to those laid down in Council Directive 2003/48/EC of 3 June 2003 on taxation of savings income in the form of interest payments