Case C-124/20: Judgment of the Court (Grand Chamber) of 21 December 2021 (request for a preliminary ruling from the Hanseatisches Oberlandesgericht Hamburg — Germany) — Bank Melli Iran v Telekom Deutschland GmbH (Reference for a preliminary ruling — Commercial policy — Regulation (EC) No 2271/96 — Protection against the effects of the extraterritorial application of legislation adopted by a third country — Restrictive measures taken by the United States of America against Iran — Secondary sanctions adopted by that third country preventing persons from engaging, outside its territory, in commercial relationships with certain Iranian undertakings — Prohibition on complying with such a law — Exercise of the right of ordinary termination)