More: Vance was asked by CBS's Ed O'Keefe Monday morning about whether the rumored detail was true, and he said that it could be possible if Iran adheres to the agreement.

"That's the sort of thing they could have access to, funded by the Gulf coast coalition, so long as they honor their end of the obligation," Vance said. He noted that Iranian officials and media would be emphasizing the benefits they receive from the deal as opposed to what they concede.