In an interview on the CBS news program “60 Minutes,” Rice rejected the idea that, once relaxed, the economic sanctions on Tehran would be hard to reinstate.

Any United Nations Security Council resolution that enshrines a final nuclear deal with Iran – not the interim six-month deal signed in Geneva in November – could have triggers to automatically reimpose sanctions on Iran if they violate the deal, she said.

“We will not construct a deal or accept a deal in which we cannot verify exactly what they are doing,” Rice said. “And if they’re caught, we will ensure that the pressure is reimposed on them.”

A mechanism for such “automatic triggers” has not been finalized, Rice said. Any deal beyond the current arrangement is still months away.