Judgment of the Court (Grand Chamber) of 21 December 2021.#Bank Melli Iran v Telekom Deutschland GmbH.#Request for a preliminary ruling from the Hanseatisches Oberlandesgericht Hamburg.#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 a right of ordinary termination.#Case C-124/20.