Commission Implementing Decision of 21 December 2011 amending Decision 2009/852/EC on transitional measures under Regulations (EC) Nº 852/2004 and (EC) Nº 853/2004 of the European Parliament and of the Council as regard the processing of non-compliant raw milk in certain milk-processing establishments in Romania and the structural requirements of such establishments (notified under document C(2011) 9562)