Changes made by Commission Implementing Decision of 19 December 2011 establishing harmonised efficiency reference values for separate production of electricity and heat in application of Directive 2004/8/EC of the European Parliament and of the Council and repealing Commission Decision 2007/74/EC (notified under document C(2011) 9523) (2011/877/EU)
EU Decision 2011/877
The legislation Commission Implementing Decision of 19 December 2011 establishing harmonised efficiency reference values for separate production of electricity and heat in application of Directive 2004/8/EC of the European Parliament and of the Council and repealing Commission Decision 2007/74/EC (notified under document C(2011) 9523) (2011/877/EU) changes, newest first. Choose one to see each change.
From legislation.gov.uk's record of changes, the official one: see it there.