# The Vehicle Emissions Trading Schemes Order 2023, Paragraph 17: Monitoring emissions of CO2: modifications relating to aerodynamic drag

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

Where this paragraph applies, the manufacturer of the base vehicle may replace Af with—
(a) the frontal area of the vehicle representative of the road load matrix family; or
(b) the mean value of the frontal area of vehicle H and of vehicle L.

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Source: https://www.legislation.gov.uk/uksi/2023/1394/schedule/3/paragraph/17 (the official version)
Page: https://openlegislation.uk/vehicle-emissions-trading-schemes-order-2023/schedule-3/paragraph-17
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.