With effect from 31 December 2012, F1the approval authority must refuse, on grounds relating to emissions, to grant F2GB type-approval in respect of new types of vehicles or engines which do not comply with this Regulation and its implementing measures.

Type-approval technical certificates corresponding to the emission stages prior to Euro VI may be granted to vehicles and engines intended for export to third countries, provided such certificates clearly state that the vehicles and engines in question cannot be placed F3on the market in Great Britain.

With effect from 31 December 2013, F4the Secretary of State must, in the case of new vehicles which do not comply with this Regulation and its implementing measures, consider certificates of conformity to be no longer valid for the purposes of F5Article 48 of Regulation (EU) 2018/858 and shall, on grounds relating to emissions, prohibit the registration, sale and entry into service of such vehicles.

With effect from the same date and except in the case of replacement engines for in-service vehicles, F6the sale or use of new engines which do not comply with this Regulation and its implementing measures is prohibited.

Without prejudice to paragraphs 1 and 2 of this Article, and subject to entry into force of the implementing measures referred to in Article 4(3), Article 5(4) and in the first subparagraph of Article 6(2), if a manufacturer so requests, F7the Secretary of State may not, on grounds relating to emissions of vehicles, refuse to grant F8GB 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.