Which should be scrapped.
Why not? It’s active vessels, if they don’t manage to not fuck up under supervision they don’t deserve to be on the ocean.
All the Officers and Engineers need to be American.
And this is the commercial fleet, not government or any of the existing arrangements you have. It would be something you gain not lose.
It could by law not compete with US vessels on the original register.
( Then to wait on the sleeping cave troll, wonder what colorful language he is going to use today)