The parameters to be monitored and reported by Member States for the purpose of the CO2 emission standards for cars and vans need to be up-dated to reflect the phasing-out of the correlation procedure from 1 January 2021, the addition of some new parameters required for in-service verification purposes. It is also necessary to clarify how the specific emission targets shall be calculated in the period 2021 to 2024 for manufacturers that enter the EU market for the first time in that period.