So far, it looks like Canada sets quotas on imports, and that level (or below) may or may not have a tariff, but then if the product is imported over that quota then the biggest tariffs kick in.
https://www.cbsa-asfc.gc.ca/publications/dm-md/d10/d10-18-1-eng.html
It appears these quotas are set at Canada's national level and whatever nation(s) supply the quota before other nations can, would probably get no, or low tariff levels. Those offering goods after the quota has been met may get hit with prohibitive tariffs. I know there is a huge trade deficit benefiting Canada.
https://www.cbsa-asfc.gc.ca/trade-commerce/tariff-tarif/2025/01-99/01-99-2025-eng.pdf
Last revision date January 1, 2025
Pg 02-1 - describes 26% tariff on 'over committment' on bovine meats
