Iran believes a trilateral agreement to divide the Caspian Sea is illegitimate. According to IRNA news agency, a spokesman for the Iranian Foreign Ministry has said the trilateral agreement to divide the Caspian Sea between Russia, Kazakhstan and Azerbaijan, which was signed on October 4, is against the principles of unanimity and illegitimate.
According to the press department of the Iranian Foreign Ministry, Hamid Reza Asefi said 'any steps to change the legal status of the Caspian Sea must be agreed upon with all countries located on the Caspian. This agreement, however, is not unanimous and will only complicate the whole issue further. Iran considers this agreement to be illegitimate.'
According to the trilateral agreement 29% of the seabed belongs to Kazakhstan, 19% to Russia and 18-19% belongs to Azerbaijan.