Regognized by whom? This is very one sided view, obviously US sided.
This kind of shit or excuses could not be pulled if we would be talking about gulf of mexico for example.
US is not center of the world and rest of the world means >95% of mankind, rest of the world is pretty fed up with that unfair treatment and things are changing. Very slowly, but steadily.
Nearly everybody recognized it as an international waterway. Iran did not official but they acted liked it was international.