Where a manufacturer so requests, the national authorities shall not, on grounds relating to the environmental performance of vehicle, refuse to grant an environmental and propulsion unit performance type-approval or national approval for a new type of vehicle, or prohibit the making available on the market, registration, or entry into service of a vehicle, system, component or separate technical unit, where the vehicle concerned complies with Regulation (EU) No 168/2013 and the detailed test requirements laid down in this Regulation.

With effect from the dates laid down in Annex IV to Regulation (EU) No 168/2013, national authorities shall, in the case of new vehicles that do not comply with the Euro 4 environmental step set out in Parts A1, B1, C1 and D of Annex VI and Annex VII to Regulation (EU) No 168/2013 or the Euro 5 environmental step set out in Parts A2, B2, C2 and D of Annex VI and Annex VII to Regulation (EU) No 168/2013 consider certificates of conformity containing previous environmental limit values to be no longer valid for the purposes of Article 43(1) of Regulation (EU) No 168/2013 and shall, on grounds relating to emissions, fuel or energy consumption, or the applicable functional safety or vehicle construction requirements, prohibit the making available on the market, registration or entry into service of such vehicles.

When applying Article 77(5) of Regulation (EU) No 168/2013, national authorities shall classify the approved vehicle type in accordance with Annex I to that Regulation.