Member States shall express the amount of energy savings required of each obligated party in terms of either primary energy consumption or final energy consumption. The method chosen to express the amount of energy savings required shall also be used to calculate the savings claimed by obligated parties. When converting the amount of energy savings, the net calorific values set out in Annex VI of Commission Implementing Regulation (EU) 2018/2066 (
7
) and the primary energy factor pursuant to Article 31 shall apply unless the use of other conversion factors can be justified.