You have not provided a link. You provided a google search page, and then went on to quote some thing specific from a non-provided link.
None the less, this was the way Obama admin circumvented the constitutional requirements for Treaty or executive agreement.
Therefore this deal was never a serious deal that had any binding agreement between The US and Iran. It was window dressing for O's legacy, not to mention he use US cold cash currency to ratify his personal deal with Iran.
the JCPOA is a non-binding political commitment.[147][148] According to the U.S. State Department, it specifically is not an executive agreement or a treaty.