# Commission Regulation (EU) No 582/2011 of 25 May 2011 implementing and amending Regulation (EC) No 595/2009 of the European Parliament and of the Council with respect to emissions from heavy duty vehicles (Euro VI) and amending Annexes I and III to Directive 2007/46/EC of the European Parliament and of the Council (Text with EEA relevance), Division 2.7.1

Extent: E+W+S+N.I.

Dual-fuel engines and vehicles shall comply with the following additional requirements:
2.7.1.1.A PEMS tests shall be performed in dual-fuel mode.
2.7.1.2.In the case of Type 1B, Type 2B and Type 3B dual-fuel engines, an additional PEMS test shall be performed in Diesel mode on the same engine and vehicle immediately after, or before, a PEMS test is performed in dual-fuel mode.
In that case, the pass or fail decision of the lot considered in the statistical procedure specified in this Annex shall be based on the following:
(a)a pass decision is reached for an individual vehicle if both the PEMS test in dual-fuel mode and the PEMS test in Diesel mode have concluded a pass;
(b)a fail decision is reached for an individual vehicle if either the PEMS test in dual-fuel mode or the PEMS test in Diesel mode has concluded a fail.

---
Source: https://www.legislation.gov.uk/eur/2011/582/annex/II/division/2/division/2.7/division/2.7.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2011-582/annex-II/division-2/division-2.7/division-2.7.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.