The Straight of Hormuz is open to any country willing to pay $2M per voyage. Any country except the U.S. and Israel.

The most important aspect of the "toll" is that Iran prefers payment in yuan, not dollars.

If Iran succeeds in nationalizing the Straight and is successful in enforcing the toll, it represents a very serious threat to the dominance of the U.S. Dollar as the world's reserve currency for trading energy.