It was not clear which of the two Vienna hotels would host Tuesday's meeting of the USA and the four other world powers and which would host Iran's meeting with the same four nations.
Former President Donald Trump withdrew from the accord in 2018, re-imposing strict US sanctions on Iran's economy and government. After Iran verifies US sanction removal measures, it will be ready to reverse its measures pertaining to the suspension of its commitments taken because of the opposite sides' violation of the deal, he added.
Meanwhile, he said: "The agenda of the meeting [in Vienna] is to lift the cruel United States sanctions against Iran and how to fulfill the nuclear deal's undertakings". The Joe Biden administration has said that if Iran returns to full compliance with the JCPOA, Washington would do the same. In exchange, sanctions were lifted by the United Nations, the USA, and the other world powers who signed on - the United Kingdom, France, Germany, Russia and China.
Price tried to downplay expectations for the Vienna talks, saying the US does not anticipate early or immediate breakthroughs.
"We don't underestimate the scale of the challenges ahead".
Khatibzadeh also repeated Iran's vow not to meet directly with the U.S.as part of Tuesday's talks. These are early days. "We have only one step which includes lifting of all U.S. sanctions; in return, Iran is ready to suspend its remedial measures and reverse actions". It may seem like semantics, and maybe it is.
The two likely venues for the talks will be the Austrian capital's Hotel Imperial and Grand Hotel Vienna, according to VOA Persian.
On the USA side, there are questions around which sanctions the Biden administration will lift, after the Trump administration targeted hundreds of Iranian businesses, officials, economic sectors, and state-owned firms and agencies. Iran insists its full compliance will only take place once USA sanctions are removed.
Iran confirmed in January it was enriching uranium to 20 percent purity, well beyond the threshold set by the 2015 deal.
Iran has called for all Trump-era sanctions to be removed, saying they violated the deal. That the Iranians will then be on a clear patient pathway to actually becoming a nuclear weapons state and I think you begin to see all of our allies in the Middle East understanding that America is completely unreliable, beginning to distance themselves from us and beginning to cozy up to what they see are going to be the clear new powers in the region.
"We certainly will not entertain unilateral gestures or concessions to get Iran - to induce Iran to a better place", Price said during the department's daily press briefing.
A staff member removes the Iranian flag from the stage after a group picture with foreign ministers and representatives of the U.S., Iran, China, Russia, Britain, Germany, France and the European Union during the Iran nuclear talks at the Vienna International Center in Vienna, Austria July 14, 2015.