The Tehran Summit of littoral Heads of State on October 16، 2007، was a turning point for issues and disputes related to the Caspian Sea legal regime in post-Soviet era. The meeting was held in a sensitive politicalinternational period when some Western states، led by the United States، attempted to give the impression that the Islamic Republic of Iran has been isolated. The Tehran Summit put an end to all their baseless allegations. In addition of being a diplomatic success for the Islamic Republic of Iran، the Summit touched several pressing issues in the Caspian Sea in which all five littoral states managed to reach consensus over principles outlined in “Tehran Declaration”. By reviewing the historical background of Caspian Sea legal regime and deliberation of different debates on the subject، the present article examines the results of Tehran summit in form of cooperation among littoral states in political، diplomatic، commercial، economic، scientific، technical، cultural and other spheres in the framework of bilateral and multilateral relations.
