True, it definitely is trickier, but it can be managed to some degree.
> The Energy Innovation and Carbon Dividend Act has a provision built in to protect trade competitiveness: a ‘Carbon Border Fee Adjustment’ imposed on covered fuels and ‘emissions-intensive trade-exposed’ (EITE) goods that cross our border in either direction. These goods include products like steel, aluminum, cement, glass, certain chemicals, and some agricultural products.
Goods that fall under this EITE classification and are imported from a country that does not have a carbon price equivalent to ours will have to pay a surcharge to make up the difference. Conversely, domestic EITE products exported to any country will get a refund for the carbon fee paid.