This comment overlooks the fact that the ICC can exert it jurisdiction (power) over two kinds of people:

- nationals of State parties committing a crime anywhere (which would exclude Americans)

- perpetrators committing a part of the crime on the territory of a State party (which includes e.g. Americans in Afghanistan, Myanmar soldiers deporting Rohingya to Bangladesh).

Thus, American CEOs not cleaning up an Oil spill in Canadian waters could be investigated and, if taken into custody, tried.