Manufacturers shall ensure that the CO₂ emission and fuel consumption values recorded in the customer information file referred to in Article 9(4) of Regulation (EU) 2017/2400 correspond to the CO₂ emissions from and fuel consumption of heavy-duty vehicles in-service as determined in accordance with that Regulation.

Following the entry into force of the procedures referred to in paragraph 4, type-approval authorities shall verify, for those manufacturers to which they have granted a licence to operate the simulation tool in accordance with Regulation (EC) No 595/2009 and its implementing measures, on the basis of appropriate and representative vehicle samples, that the CO₂ emission and fuel consumption values recorded in the customer information files correspond to the CO₂ emissions from and fuel consumption of heavy-duty vehicles in-service as determined in accordance with that Regulation and its implementing measures, while considering, inter alia, using available data from on-board fuel and/or energy consumption monitoring devices.

Type-approval authorities shall also verify the presence of any strategies on board or relating to the sampled vehicles that artificially improve the vehicle’s performance in the tests performed or in the calculations made for the purpose of certifying the CO₂ emissions and fuel consumption by, inter alia, using data from on-board fuel and/or energy consumption monitoring devices.

Where a lack of correspondence of CO₂ emission and fuel consumption values which cannot be attributed to a malfunctioning of the simulation tool, or the presence of any strategies artificially improving a vehicle’s performance, is found as a result of the verifications performed pursuant to paragraph 2, the responsible type-approval authority shall, in addition to taking the necessary measures set out in Chapter XI of Regulation (EU) 2018/858, ensure that the customer information files, the certificates of conformity and the individual approval certificates are corrected, as the case may be.

The Commission shall determine, by means of implementing acts, the procedures for performing the verifications referred to in paragraph 2 of this Article. Those implementing acts shall be adopted in accordance with the examination procedure referred to in Article 16(2).

The Commission is empowered, prior to adopting the implementing acts referred to in the first subparagraph, to adopt a delegated act in accordance with Article 17, in order to supplement this Regulation by setting out the guiding principles and criteria for defining the procedures referred to in the first subparagraph.