The Trump Administration used Section 338 to target Canadian products in several ways:
- Additional 50% ad valorem on certain Canadian goods
- Does not stack with Section 232 tariffs
- Does not apply to goods claiming chapter 98 duty-free treatment (except for the value of repairs, alterations, assembly)
- No exclusion for goods covered under the US-Mexico-Canada (USMCA) agreement
- Goods going into a Foreign Trade Zone (FTZ) must be admitted as “privileged foreign status”
The proclamations will take effect at 12:01 am EST on August 19th, 2026.























