The Convention was ratified by the Azerbaijani Parliament and signed by President Ilham Aliyev on April 4, 2006, the country's presidential press service told Interfax.

The Convention was signed in Teheran on November 4, 2003. It is aimed at joint protection of the Caspian Sea environment, including defense, recovery and prolonged effective usage of the sea's biological resources by all Caspian Sea countries.

The Convention was prepared on the basis of U.N.-initiated talks amongst Caspian Sea countries in 1995-2003.