Members of the Iranian delegation to the nucl
Members of the Iranian delegation to the nuclReuters

United Nations (UN) sanctions against Iran will be restored in the event the Islamic Republic breaks a nuclear framework agreement, the P5+1 powers decided Sunday. 

The major development in negotiations between Iran and the United States, Britain, France, Germany, Russia and China clears a large hurdle toward the formation of such an agreement, according to an exclusive Reuters report. 

According to officials involved in talks, a framework agreement would see the sanctions restored after a dispute-resolution panel including the P5+1 and Iran; the panel would produce a non-binding opinion that would be compared to International Atomic Energy Agency (IAEA) data before the final decision was made.

The sanctions would also be rolled back without a UN Security Council vote. 

Western officials told the news agency that the clause is still "tentative" and dependent on Iran's acceptance. 

While world powers have talked about a gradual rolling back of sanctionsagainst Iran's nuclear program, Iran has demanded that all sanctions be lifted immediately upon signing an agreement.

The sides signed a framework deal on April 2, but are under pressure to formalize a final deal by June 30.