The Comprehensive Economic and Trade Agreement must still clear some 40 national and regional parliaments in Europe in the coming years to enter fully into force.
Belgium's regions have prepared an addendum to the trade deal to answer their concerns. But, it still requires approval from Canada and 27 other EU states before CETA is signed.
Belgium's Wallonia region is blocking the deal over fears that an arbitration mechanism will allow foreign companies to bypass domestic standards.
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