New Delhi, Feb. 24 -- Federal Express has filed suit against the United States government seeking a "full refund" of tariffs imposed under President Donald Trump's emergency economic powers, days after the Supreme Court ruled those levies unlawful. The case, lodged at the US Court of International Trade, marks the first major corporate effort to reclaim duties paid under a regime the high court struck down in a 6-3 decision last week.

The lawsuit intensifies the legal and financial repercussions of the Supreme Court's ruling on tariffs imposed under the International Emergency Economic Powers Act (IEEPA), raising the prospect of billions of dollars in repayment claims across corporate America.

FedEx filed its 11-page complaint at the Co...