Costco has sued the Trump administration for a refund of the tariffs it has paid on imported goods, should the Supreme Court rule them illegal, becoming one of the largest companies to challenge President Donald Trump’s sweeping levies in court.

The complaint, filed Friday in the U.S. Court of International Trade, argues that Trump misused a 1977 law in his move to implement tariffs on products from more than 100 countries.

The lawsuit asserts that Congress, not the president, has the authority to set tariffs, and that Trump exceeded the authority granted to him by the law, the International Emergency Economic Powers Act, or IEEPA.

“The text of IEEPA does not use the word ‘tariff’ or any term of equivalent meaning,” Costco states in the lawsuit, which was reported earlier by NBC News. T

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