Tariq Rauf, SIPRI's director of the Disarmament, Arms Control and Non-Proliferation Program, said the Iran-G5+1 accord is the most distinguished nuclear accord in two decades.
He said the nuclear accord testifies grant of the 2016 Noble Peace Prize to John Kerry and Mohammad-Javad Zarif.
He added that Iran nuclear accord will pave the way for getting confident over peaceful nature of Iran's nuclear program and lift of sanctions.