Article 12U.K.EU type-approval procedures
Without prejudice to Article 11 and subject to entry into force of the implementing measures referred to in Article 68 of Regulation (EU) No 167/2013, if a manufacturer so requests, national authorities may not, on grounds relating to emissions of vehicles, refuse to grant EU type-approval or national type-approval for a new type of vehicle or engine, or prohibit the registration, sale or entry into service of a new vehicle and the sale or use of new engines, where the vehicle or engines concerned comply with this Regulation and its implementing measures.