Article 3a 4.

Notwithstanding Article 2(3) of Regulation (EU) 2017/2400, approved heavy-duty vehicles falling under Article 2(3), first subparagraph, point (b), of Regulation (EU) 2018/858 shall not be subject to the CO2 emissions reduction targets set out in paragraphs 1 to 3 of this Article, unless the manufacturer chooses to include those heavy-duty vehicles in the calculation of its specific CO2 emissions and targets when reporting those heavy-duty vehicles in accordance with Part B of Annex IV to this Regulation.