Regulation on type approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information European Union (27) (2007)

(EC) No 715/2007
"This Regulation establishes common technical requirements for the type approval of motor vehicles (vehicles) and replacement parts, such as replacement pollution control devices, with regard to their emissions. In addition, this Regulation lays down rules for in-service conformity, durability of pollution control devices, on-board diagnostic (OBD) systems, measurement of fuel consumption and accessibility of vehicle repair and maintenance information."
"This Regulation shall apply to vehicles of categories M1, M2, N1 and N2 as defined in Annex II to Directive 70/156/EEC with a reference mass not exceeding 2 610 kg."
"Member States shall lay down the provisions on penalties applicable for infringement by manufacturers of the provisions of this Regulation and shall take all measures necessary to ensure that they are implemented. The penalties provided for must be effective, proportionate and dissuasive. Member States shall notify those provisions to the Commission by 2 January 2009 and shall notify it without delay of any subsequent amendment affecting them." (http://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1470829554249&uri=CELEX:32007R0715)
Euro 5 and Euro 6 standards can be found here: http://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1470829554249&uri=CELEX:32007R0715