Pursuant to the negotiations between H.E. Dr. Larijani, I. R. of Iran's Secretary of Supreme National Security Council and H.E. Dr. ElBaradei, Director General of the IAEA, in Vienna; following the initiative and good will of the Islamic Republic of Iran and the agreement made, a high ranking delegation consisting of the directors of technical, legal and political departments of the IAEA, paid a visit to Tehran from 11 to 
12 July 2007 during which “Understandings of The Islamic Republic of Iran and the IAEA on the Modalities of Resolution of the Outstanding Issues, Tehran 12 July 2007” were prepared. 

A second meeting took place in Vienna on 24 July 2007 followed by a further meeting in Iran from 20 to 21 August 2007. The Agency's delegation had the opportunity to have meetings with H.E. Dr. Larijani during both visits to Tehran. Following these three consecutive meetings, both Parties reached the following understandings: