Remember, the deal didn’t require Iran to renounce its support of terrorism, and didn’t even prohibit Iran from using the money freed up by the deal for the support of terrorists
UN: Hey, don’t worry, Iran is complying with the nuclear deal!
It would be almost impossible for Iran not to be in compliance with it, because there’s almost nothing the agreement actually requires of them. They don’t have to submit to unannounced inspections. And even if they’re accused of violating the deal they have almost a month to hide the evidence before anyone is allowed to go and verify it.
Barring a live YouTube broadcast in which they pull a nuclear-tipped missile off the assembly line and write on it, “DIE, ISRAEL,” I don’t know how they could possibly violate the deal.