A lawmaker condemned as illegal the establishment of working groups by the United States and its European allies on fixing what Washington sees as flaws in the Iran nuclear deal.
"The formation of the JCPOA-fixing committees is not legal as it has not been allowed by JCPOA's provisions and if Europeans back such a move, it would clearly confirm the Islamic Republic's skepticism about their unreliability," Mohammad Javad Jamali told ICANA on Friday.
He was using an abbreviation that stands for the formal title of the deal, namely the Joint Comprehensive Plan of Action.
Under the action plan, the administration of former US president Barack Obama and those of the other five major powers agreed to ease economic sanctions against Iran in return for temporary curbs on its nuclear program.
The UN-endorsed accord, however, is facing harsh criticism of incumbent US President Donald Trump, who has branded it "the worst deal ever negotiated."
Trump has vowed to stop waiving US sanctions unless the Europeans agreed to strengthen the deal's terms by consenting to a side agreement that would effectively eliminate provisions that allow Iran to gradually resume some advanced atomic work.
Iran has denied western allegations that it has been seeking a nuclear warhead and insists that its nuclear program has always pursued civilian purposes.
Trump also wants tighter restrictions on Iran's ballistic missile program.
Iran has rejected Trump's demand for a renegotiation of the JCPOA and for new constraints on its missile and regional activities.
US Secretary of State Rex Tillerson has claimed that Washington's European allies have agreed to join it in addressing its concerns regarding Iran by participating in such working groups.
London, Paris, and Berlin share Trump's non-nuclear concerns about Iran and have expressed readiness to cooperate with him to address them.
But they have rejected Trump's call for a renegotiation of the deal, arguing that it is working and Tehran's compliance has been fully verified by the UN nuclear agency, the JCPOA's oversight body.
Another parliamentarian, Mehrdad Lahouti, expressed reservations about the ability of the European parties to the deal, namely Britain, France and Germany, to resist Trump's demands for long.
"The Americans have so far failed to rally the support of the European countries for their hostile JCPOA stance, but it appears that in the long run the Europeans cannot stand against the US," Lahouti said.