There's nothing in international law that makes that automatic.
It would create an interesting open question how the IMF would respond. In practice, it won't happen because raising the question would (as you noted) bea colossally stupid move for the US for global influence reasons. They have a lot of leverage from being the printer of the world's currency-of-record.
It would create an interesting open question how the IMF would respond. In practice, it won't happen because raising the question would (as you noted) bea colossally stupid move for the US for global influence reasons. They have a lot of leverage from being the printer of the world's currency-of-record.