In accordance with Articles 18, 25 and 33 of Regulation (EU) No 168/2013 and with effect from the dates laid down in Annex IV to Regulation (EU) No 168/2013, national authorities shall, as regards new vehicles not complying with Regulation (EU) No 168/2013 and this Regulation, consider certificates of conformity to be no longer valid for the purposes of Article 43(1) of Regulation (EU) No 168/2013 and shall, on grounds relating to emissions, fuel or energy consumption, or the applicable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.