Judgment of the Court (Second Chamber) of 15 April 2021.#Eutelsat SA v Autorité de régulation des communications électroniques et des postes (ARCEP) and Inmarsat Ventures SE.#Reference for a preliminary ruling – Approximation of laws – Telecommunications sector – Harmonised use of radio spectrum in the 2 GHz frequency bands for bringing into operation systems providing mobile satellite services – Decision No 626/2008/EC – Article 2(2)(a) and (b) – Article 4(1)(c)(ii) – Article 7(1) and (2) – Article 8(1) and (3) – Mobile satellite systems – Concept of ‘mobile earth station’ – Concept of ‘complementary ground components’ – Concept of ‘required quality’ – Respective role of satellite and ground components – Requirement for a selected operator of mobile satellite systems to provide service for a certain percentage of the population and territory – Non-compliance