BRUSSELS — The European Commission urged the United States on Sunday to abide by the terms of the trade deal struck last year with the European Union, as Washington announced new global tariff hikes a day after an adverse Supreme Court ruling.

"A deal is a deal," said a commission statement.

"As the United States' largest trading partner, the EU expects the US to honor its commitments set out in the Joint Statement — just as the EU stands by its commitments," it added.

"The European Commission requests full clarity on the steps the United States intends to take following the recent Supreme Court ruling on the International Emergency Economic Powers Act (IEEPA)."

The US administration temporarily raised the global duty on imports into the country to 15 percent on Saturday.

The move delivered a fresh jolt of uncertainty just a day after the Supreme Court ruled much of the administration's international tariffs campaign illegal.

Brussels and Washington struck an agreement last year setting US tariffs at a maximum 15 percent on most European goods.

"EU products must continue to benefit from the most competitive treatment, with no increases in tariffs beyond the clear and all-inclusive ceiling previously agreed," the European Commission said.

It warned that "when applied unpredictably, tariffs are inherently disruptive, undermining confidence and stability across global markets and creating further uncertainty across international supply chains".

The EU executive said it remained "in close and continuous contact" with the US administration and that Trade Commissioner Maros Sefcovic had spoken with US Trade Representative Jamieson Greer and Commerce Secretary Howard Lutnick on Saturday.

Greer told US broadcaster CBS on Sunday that Washington's deals with the EU and other partners remained in force despite the Supreme Court ruling.

"So we're having active conversations with them. We want them to understand that these deals are going to be good deals," he told the Face the Nation program.

However, European Central Bank President Christine Lagarde told the same show that she was not sure what the consequences of the US court decision were.

"I hope it's going to be clarified," she said.

The European Parliament's trade committee had been due to approve the EU-US deal on Tuesday, but the Supreme Court judgment casts doubts on that happening now.

The committee's head, Bernd Lange, said he would call during a meeting of Parliament's political groups on Monday for putting "legislative work on hold until we have a proper legal assessment and clear commitments from the US side".

"Pure tariff chaos from the US administration. No one can make sense of it anymore — only open questions and growing uncertainty for the EU and other US trading partners," Lange wrote.

"Clarity and legal certainty are needed before any further steps are taken," he said.

Meanwhile, the US Customs and Border Protection agency said it will halt collections of tariffs imposed under the International Emergency Economic Powers Act at 12:01 am EST on Tuesday.

The agency said in a message to shippers on its Cargo Systems Messaging Service that it will deactivate all tariff codes associated with the administration's prior IEEPA-related orders as of Tuesday.

The tariff collection halt coincides with the administration's imposition of a new, 15 percent global tariff under a different legal authority to replace the ones struck down by the Supreme Court on Friday.

Analysts at ING bank wrote on Sunday that even if new US tariffs might be legally challenged, they could just be "smoke and mirrors" to buy time for another tariff option.

That could be tariffs on the basis of unfair trade practices or trade agreement violations, for example, they wrote. "It now remains unclear whether the (European) Parliament will push for a full renegotiation of the deal," ING said.

For India, a source in its trade ministry said on Sunday that the country has delayed plans to send a trade delegation to Washington this week, Reuters reported. It was one of the first concrete reactions among Asian economies to the decision.

"The decision to defer the visit was taken after discussions between officials of the two countries," the source said on condition of anonymity. "No new date for the visit has been decided."

The delay came mainly from the uncertainty over tariffs following Friday's judgment, the source added.

Agencies via Xinhua