The project gained momentum following the Ankara Declaration, adopted on 29 October 1998 by President of Azerbaijan Heydar Aliyev, President of Georgia Eduard Shevardnadze, President of Kazakhstan Nursultan Nazarbayev, President of Turkey Süleyman Demirel, and President of Uzbekistan Islam Karimov. The declaration was witnessed by the United States Secretary of Energy Bill Richardson, who expressed strong support for the pipeline. The intergovernmental agreement in support of the pipeline was signed by Azerbaijan, Georgia, and Turkey on 18 November 1999, during a meeting of the Organization for Security and Cooperation in Europe (OSCE) in Istanbul, Turkey.