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It takes about two seconds of thought to realize that there is no way on Earth to stop Iran from transferring money to Hezbollah or the Houthis.
And if you look at the UNSC resolutions against Iran, not one of them discusses transferring money.
Kerry lied in his answer, and his lie reveals that Iran will get a windfall that will help fund Assad, Hezbollah and worldwide terror.
(h/t Mike A)