ROAD TRAFFIC Citation, commencement and extent 1 1 These Regulations may be cited as the New Heavy-Duty Vehicles (Carbon Dioxide Emission Performance Standards) (Vocational Vehicles) Regulations 2025 and come into force on 29th July 2025. 2 These Regulations extend to England and Wales, Scotland and Northern Ireland. Interpretation 2 In these Regulations— “ Commission Regulation (EU) 2017/2400 ” means 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 CO 2 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 ; “ heavy-duty vehicle ” means a vehicle to which any of points (a) to (d) of Article 2 (1) of Regulation (EU) 2019/1242 apply; “ manufacturer ” has the meaning given in Article 3 (10) of Regulation (EU) 2019/1242 ; “ misreported vehicle ” means a heavy-duty vehicle that— was certified as a vocational vehicle based on the data reported by the manufacturer in accordance with Article 5 of Regulation (EU) 2018/956 ; and was registered as a non-vocational vehicle based on the data reported to the Secretary of State in accordance with Article 4 of Regulation (EU) 2018/956 ; “ non-vocational vehicle ” means a heavy-duty vehicle other than a vocational vehicle; “ Regulation (EU) 2018/956 ” means Regulation (EU) 2018/956 of the European Parliament and of the Council on the monitoring and reporting of CO 2 emissions from and fuel consumption of new heavy-duty vehicles ; “ Regulation (EU) 2019/1242 ” means Regulation (EU) 2019/1242 of the European Parliament and of the Council setting CO 2 emission performance standards for new heavy-duty vehicles and amending Regulations (EC) No 595/2009 and (EU) 2018/956 of the European Parliament and of the Council and Council Directive 96/53/EC ; “ vocational vehicle ” has the meaning given in Article 3 (16) of Commission Regulation (EU) 2017/2400 . Identification of misreported vehicles 3 1 Where a misreported vehicle is identified, the Secretary of State must notify the manufacturer of the vehicle. 2 Within one month of receiving a notification under paragraph (1) , a manufacturer may provide to the Secretary of State information to show that the vehicle was correctly certified as a vocational vehicle. 3 Where, following receipt of any information under paragraph (2) , the Secretary of State considers that a misreported vehicle was incorrectly certified as a vocational vehicle, the Secretary of State must correct the manufacturer’s average specific CO 2 emissions for the reporting period of the relevant year to take that vehicle into account. Procedure for correcting average specific CO 2 emissions 4 1 The Secretary of State may correct a manufacturer’s average specific CO 2 emissions using the correct CO 2 values of a misreported vehicle. 2 Where the correct CO 2 values of a misreported vehicle are not already available, the Secretary of State may request that a manufacturer determine the correct CO 2 values according to the technical characteristics of that vehicle. 3 Where a manufacturer determines the correct CO 2 values of a misreported vehicle following a request under paragraph (2) , the manufacturer must use the same version of the simulation tool as used for the original determination of the CO 2 values of that vehicle, unless the Secretary of State permits otherwise. 4 Where a manufacturer fails to determine the correct CO 2 values of a misreported vehicle within two months of receiving a request under paragraph (2) , the Secretary of State may correct the manufacturer’s average specific CO 2 emissions using the formula set out in the Schedule . 5 In this regulation— “ correct CO 2 values ” means the CO 2 emissions and fuel consumption of a misreported vehicle as a non-vocational vehicle, determined using the simulation tool in accordance with Commission Regulation (EU) 2017/2400 ; “ simulation tool ” means an electronic tool used to determine CO 2 emissions and fuel consumption of vehicles as provided for in Article 5 of Commission Regulation (EU) 2017/2400 . Signed by authority of the Secretary of State Lilian Greenwood Parliamentary Under Secretary of State Department for Transport 2nd July 2025