The International Tropical Timber Agreement (ITTA, 1983) is an agreement to provide an effective framework for cooperation between tropical timber producers and consumers and to encourage the development of national policies aimed at sustainable utilization and conservation of tropical forests and their genetic resources.The International Tropical Timber Organization was established under this agreement. Opened for signature - November 18, 1983 Entered into force - April 1, 1985; this agreement expired when the International Tropical Timber Agreement, 1994, went into force.