http://www.legislation.gov.uk/eur/2013/143/article/4Commission Regulation (EU) No 143/2013 of 19 February 2013 amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EC) No 692/2008 as regards the determination of CO2 emissions from vehicles submitted to multi-stage type-approval (Text with EEA relevance)Commission Regulation (EU) No 143/2013Commission Regulation (EU) No 143/2013 of 19 February 2013 amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EC) No 692/2008 as regards the determination of CO2 emissions from vehicles submitted to multi-stage type-approval (Text with EEA relevance)2020-12-13King's Printer of Acts of Parliamenthttps://webarchive.nationalarchives.gov.uk/eu-exit/https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32013R0143texttext/xmlen2013-02-19 Article 4 1 For a transitional period until 1 January 2014, certificates of conformity of base vehicles of category N1 within the scope of Regulation (EC) No 715/2007 issued in accordance with Directive 2007/46/EC and Regulation (EC) No 692/2008 before the amendments introduced by this Regulation, shall continue to be valid. 2 For a transitional period until 1 January 2014, certificates of conformity of completed vehicles of category N1 within scope of Regulation (EC) No 715/2007 issued in accordance with Directive 2007/46/EC and Regulation (EC) No 692/2008 before the amendments introduced by this Regulation, shall continue to be valid. 3 With effect from 1 January 2013, national authorities shall consider certificates of conformity complying with the requirements set out in this Regulation to be valid.