This report has a demonstrative nature only. To a great extent it is based on the British Impact Assessment methodology. However, the main disparity regards the way of calculating the benefits of CO2 reductions. The scope of the report is limited to the EU ETS Directive. It does not cover broader policy issues. This Report presents the impact assessment of the implementation of Directive 2003/87/EC of the European Parliament and of the Council of 13 October 2003 establishing a scheme for greenhouse gas emission allowance trading within the Community and amending Council Directive 96/61/EC (OJ No L275, 25.10.2003, p. 32) hereinafter referred to as the EU ETS Directive within the scope amended by Directive 2009/29/EC of the European Parliament and of the Council of 23 April 2009 amending Directive 2003/87/EC so as to improve and extend the greenhouse gas emission allowance trading scheme of the Community (OJ No L140, 5.6.2009, p. 63), hereinafter referred to as Directive 2009/29/EC.