Cairn Energy has filed a lawsuit against Air India in the U.S. District Court for the Southern District of New York in an effort to force the Indian government to pay a USD 1.2 billion arbitration reward. The lawsuit stems from a decision issued in December 2020 by the Tribunal of the Permanent Court of Arbitration (PCA) in the case of Cairn Energy PLC & Cairn UK Holdings Limited v. India, which involved a retrospective capital gains tax assessment resulting from changes made by the Finan…