# Commission Regulation (EU) 2017/2400 of 12 December 2017 implementing Regulation (EC) No 595/2009 of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles and amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011 (Text with EEA relevance), Division 3.11: Declaration of air drag value

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

Base value for the declaration of the air drag value is the final result for Cd · Acr (0) as calculated by the air drag pre-processing tool. The applicant for a certificate shall declare a value Cd · Adeclared in a range from equal up to a maximum of + 0,2 m2 higher than Cd · Acr (0). This tolerance shall take into account uncertainties in the selection of the parent vehicles as the worst case for all testable members of the family. The value Cd · Adeclared shall be the input for the simulation tool and the reference value for conformity of the certified CO2 emissions and fuel consumption related properties testing.
Several declared values C d ·A declared can be created based on a single measured C d ·A cr (0) as long as the family provisions in accordance with point 4 of Appendix 5 are fulfilled.

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Source: https://www.legislation.gov.uk/eur/2017/2400/annex/VIII/division/3/division/3.11 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-2400/annex-VIII/division-3/division-3.11
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.