The primary customs valuation method across the Western world is “transaction value”, which is a way of valuing goods coming across international borders. Transaction value is used by both the US Customs and Border Protection Agency (CBP) and the Canada Border Services Agency (CBSA) to value imported goods entering their respective territories.
Tax & Trade Blog

Rob Kreklewetz & Peter Werhun
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As covered in a prior blog, Canada has one of the most tightly-controlled dairy industries in the world. It is not surprising then that the first decision of a dispute resolution panel (“Panel”) under the Canada-United States-Mexico Agreement (“CUSMA”) would involve Canada's dairy “supply management” system (the “Dairy Decision”).
Ultimately, despite a US victory, the limited scope of the Dairy Decision means that any changes expected from Canada are unlikely to satisfy US-based dairy producers – with both sides seemingly claiming victory!