Canada has signed the revised North American free trade agreement with Mexico and the United States, clearing the way for the contentious pact's long-awaited ratification.

"Today Canada, the United States and Mexico have agreed to improvements of the new NAFTA that strengthen state-to-state dispute settlement, labour protection, environmental protection, intellectual property, the automotive rules of origin, and will help to keep the most advanced medicines affordable for Canadians." 

Speaking to reporters after the official signing ceremony, Freeland said the amended deal was good for the whole country. But she singled out Quebec's aluminum industry as one that will benefit.

The revised deal requires that 70 percent of the aluminum in all North American cars come from NAFTA countries, with Quebec being the primary producer of the metal within the three countries. 

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