L 179/26 Official Journal of the European Union 19.6.2014 COMMISSION DELEGATED REGULATION (EU) No 666/2014 of 12 March 2014 establishing substantive requirements for a Union inventory system and taking into account changes in the global warming potentials and internationally agreed inventory guidelines pursuant to Regulation (EU) No 525/2013 of the European Parliament and of the Council (Text with EEA relevance) THE EUROPEAN COMMISSION, Having regard to the Treaty on the Functioning of the European Union, Having regard to Regulation (EU) No 525/2013 of the European Parliament and of the Council of 21 May 2013 on a mechanism for monitoring and reporting greenhouse gas emissions and for reporting other information at national and Union level relevant to climate change and repealing Decision No 280/2004/EC ('), and in particular Article 6(2) and Article 7(6)(b) thereof, Whereas: (1)  The mechanism for monitoring and reporting greenhouse gas emissions is necessary to enable the assessment of the actual progress towards meeting the Union’s and the Member States’ commitments relating to the limitation or reduction of all greenhouse gas emissions under the United Nations Framework Convention on Climate Change (UNFCCC) approved by Council Decision 94/69/EC (), its Kyoto Protocol approved by Council Decision 2002/358/EC () and the set of Union legal acts, adopted in 2009, collectively referred to as the ‘Climate and Energy Package’. (2)  Decision 19/CMP.1 of the Conference of the Parties to the UNFCCC serving as the meeting of the Parties to the Kyoto Protocol lays down the guidelines for national systems the Parties should apply. The rules on the Union inventory system should therefore be specified in order to fulfil the obligations pursuant to that Decision, ensuring the timeliness, transparency, accuracy, consistency, comparability and completeness of reporting of greenhouse gas emissions to the UNFCCC Secretariat. (3)  To ensure the quality of the Union inventory system, it is necessary to establish further rules on the Union green- house gas inventory quality assurance and quality control programme. (4)  In order to ensure completeness of the Union’s inventory in accordance with the guidelines for preparing the national greenhouse gas inventories it is necessary to provide for the methodologies and the data to be used by the Commission when, in consultation and close cooperation with the Member State concerned, preparing esti- mates for data missing from a Member State inventory pursuant to Article 9(2) of Regulation (EU) No 525/2013. (5)  In order to ensure the timely and effective implementation of Union’s obligations under the Kyoto Protocol of the UNFCCC it is necessary to set the timescales for cooperation and coordination during the annual reporting process and the UNFCCC review between Member States and the Union. (6)  Account should be taken of changes in the global warming potential values and internationally agreed guidelines for national inventories of anthropogenic emissions by sources and removals by sinks in accordance with relevant decisions adopted by the bodies of the UNFCCC and the Kyoto Protocol. (7)  In order to ensure consistency with the implementation of monitoring and reporting requirements under the UNFCCC and the Kyoto Protocol, this Regulation should apply from 1 January 2015, () OJL165,18.6.2013,p. 13. (*) Council Decision 94/69/EC of 15 December 1993 concerning the conclusion of the United Nations Framework Convention on Climate Change (OJ L 33,7.2.1994, p. 11). (®) Council Decision 2002/358/EC of 25 April 2002 concerning the approval, on behalf of the European Community, of the Kyoto Protocol to the United Nations Framework Convention on Climate Change and the joint fulfilment of commitments thereunder (OJ L 130, 15.5.2002, p. 1).