AQUALEX is a thematic database of FAOLEX, one of the world's largest online repositories of national laws, regulations and policies on food, agriculture and natural resources management. AQUALEX provides free access to national and international legal and policy instruments regarding water. In addition, for an increasing number of selected countries and transboundary waters, legal profiles summarizing the water regulatory framework are available. AQUALEX is a legal mapping tool for in-depth understanding of IWRM relationships through legislation and policies.