India, Aug. 31 -- A federal appeals court in the US has ruled that President Donald Trump's global tariffs, including the 50% duties imposed on India, were illegally applied, dealing a major blow to the administration's trade strategy while casting uncertainty over trillions of dollars in global commerce.

The US Court of Appeals for the Federal Circuit - roughly an equivalent of a high court in India - ruled 7-4 on Friday that Trump exceeded his authority by invoking a 1970s-era emergency law to impose the sweeping tariff regime, upholding an earlier decision by the Court of International Trade.

However, the landmark ruling will not take immediate effect, with the court setting October 14 as the deadline before any changes occur. This p...