Country-of-Origin Labelling, or COOL, is a law that requires vendors to label fresh beef, pork and lamb with the country it came from. Additional requirements were passed in 2008, to include more items like fresh fruits and vegetables and nuts.
Canada argued that it discouraged imports, added to export costs and lowered the value of Canadian cattle by 100 dollars a cow.
Agriculture Minister Don McRae says the ruling is a "clear victory" for B.C.'s livestock, adding it "is a testament to what can be accomplished when government and industry work together for a common good. B.C. producers are among the most competitive in the world, and today's ruling eliminates a needless regulatory burden for them."
The U.S. has 60 days to appeal the ruling.