I don't agree that it's "trivial". The devil will be in the detail and could drag out in the courts depending on the language definitions. Quite apart from the

I don't agree that it's "trivial". The devil will be in the detail and could drag out in the courts depending on the language definitions. Quite apart from the fact that anything dreamt up at short notice is going to have shortcomings, tariffs are much easier impose when you're transporting physical objects across physical borders.