(32)Regulations (EU) 2019/631 and (EU) 2019/1242 regulate the average fleet CO 2 emission performance for new motor vehicles in the Union. The procedures and methodologies for the accurate determination of CO 2 emissions, fuel and electric energy consumption, electric range and power for individual vehicles should be introduced in emission type-approval, including updating and developing the vehicle energy consumption calculation tool (VECTO) in order to better take into account, among other aspects, the energy efficiency of heavier vehicle combinations.