Article 11 3.

Where the type-approval procedures referred to in Regulation (EC) No 595/2009 are amended as referred to in paragraph 2, point (a), of this Article, the implementing acts referred to in paragraph 2 of this Article shall either specify or establish a methodology for defining one or more representative vehicles of a vehicle sub-group, including their statistical weightings and the payload and passenger number values to be used for the determination of CO2 emissions. That methodology shall be the basis for the calculation of the adjustment referred to in paragraph 2, point (a)(i), of this Article, taking into account the monitoring data reported pursuant to this Regulation and the technical characteristics referred to in Article 12(1) of Regulation (EU) 2017/2400. Those implementing acts shall be adopted in accordance with the examination procedure set out in Article 16(2) of this Regulation.