Here's why: Chapter 19 allows Canada to bypass the U.S. judicial review process when the U.S. government imposes antidumping and / or countervailing duties on Canadian products imported into the United States, as has been the case repeatedly with softwood lumber, for example. (macleans.ca)
These decisions of both the B.C. Supreme Court and the Federal Court are, however, puzzling, as complex factual issues are not beyond judicial review processes. (ngariss.com)
Here the Court of Appeal has sent a message: it prefers that individuals appeal UCAB decisions through the established judicial review process rather than look for a more favourable outcome in another forum. (supremeadvocacy.ca)