The requests will be considered at the next meeting of the WTO dispute settlement body, which is scheduled for October 29.
Nine WTO members -- Canada, China, the EU, India, Mexico, Norway, Russia, Switzerland and Turkey -- have filed initial complaints that allege Trump’s tariffs on steel and aluminium violated WTO rules. But Thursday’s move takes the disputes an important step closer to a formal case.
The complaints differ slightly, but each country alleges that the measures violate core WTO agreements such as the General Agreement on Tariffs and Trade, or GATT, and the WTO Safeguards Agreement, which governs the use of temporary trade restrictions, known as safeguards.