Enrique Mora, EU special envoy coordinating talks on reviving the Iran nuclear deal (second from left), and Iran’s chief negotiator Ali Bagheri Kani (second from right) at the new negotiating round in Vienna, Austria on December 9, 2021. (Photo: AFP/VNA)

Kani told Iran’s state-run Press TV that many points of difference remain unresolved which will require high-level decision making.

He said Tehran will not accept anything less than the nuclear agreement it signed with world powers in 2015, stressing that it will be Tehran’s red line at the talks in Vienna.