The dispute dates back for years, but the WTO decided this year that mandatory COOL violated international trade rules, because it disadvantaged companies importing meat and livestock into the US.
Now the WTO has said that Canada can suspend tariff concessions and other trade obligations to the US to the value of CA $1,054.729 million, whilst Mexico can do so to the value of US $227.758 million.
The two countries must ask the WTO again for approval before the new tariffs can be activated, however.