[F1Article 17a U.K. Transitional provisions for certain type-approvals and certificates of conformity

1. With effect from 1 September 2018 , national authorities shall refuse, on grounds relating to emissions, to grant EC type-approval or national type-approval in respect of new types of vehicles or engines tested using procedures which do not comply with points 4.2.2.2 and 4.2.2.2.1 and 4.2.2.2.2 and 4.3.1.2 and 4.3.1.2.1 and 4.3.1.2.2 of Appendix 1 to Annex II.

2. With effect from 1 September 2019 , national authorities shall, in the case of new vehicles which do not comply with points 4.2.2.2 and 4.2.2.2.1 and 4.2.2.2.2 and 4.3.1.2 and 4.3.1.2.1 and 4.3.1.2.2 of Appendix 1 to Annex II, consider certificates of conformity issued in respect of those vehicles to be no longer valid for the purposes of Article 26 of Directive 2007/46/EC and shall, on grounds relating to emissions, prohibit the registration, sale and entry into service of such vehicles.

With effect from 1 September 2019 and except in the case of replacement engines for in-service vehicles, national authorities shall prohibit the sale or use of new engines which do not comply with points 4.2.2.2 and 4.2.2.2.1 and 4.3.1.2 and 4.3.1.2.1 of Appendix 1 to Annex II.]