US President Donald Trump on Friday signed a 10 per cent global tariff order on top of existing import duties--for a period of about 5 months, signalling an escalation of his trade policy despite a setback from the Supreme Court of the United States. The new levy will take effect at 12:01 a.m. ET on February 24, as per the White House fact sheet. Trump told a briefing he was ordering new tariffs under Section 122 of the Trade Act of 1974, duties that would go on top of surviving tariffs. These would partly replace tariffs of 10% to 50% under the 1977 International Emergency Economic Powers Act that the top court declared illegal.