Yeah. The big thing for me is you'd want to discourage big shipping vessels burning bunker fuel. Even with equal pollution/labor standards, shipping something from china to the US probably shouldn't happen.

I could see an exception if nuclear powered shipping became a thing, but that isn't really likely (I wouldn't want a shipping company in charge of nuclear waste management). That leaves us with battery electric shipping and... well... that's a TON of batteries. Battery density would need to be WAY higher than it is (like, near fuel density)