Established in 1994, UNCCD is the sole legally-binding international agreement linking environment and development to sustainable land management. The Convention addresses specifically the arid, semi-arid and dry sub-humid areas, known as the drylands, where some of the most vulnerable ecosystems and peoples can be found. In line with Article 23 of the UNCCD, the key function of the secretariat is to service the sessions of the COP and its subsidiary bodies.