A member of National Security and Foreign Policy Committee of Iran's Majlis, who spoke on condition of anonymity, told Mehr News parliamentary reporter that in this session attended by 206 MPs and chaired by Majlis deputy speaker Mohammadreza Bahonar, Mohammad Javad Zarif clearly declared that if the other side does not fulfill its commitments towards Iran, Tehran, in turn, will return to the starting point and commence the 20% enrichment.