The legal basis for transboundary cooperation is also examined: bilateral and river basin agreements on transboundary waters, as well as relevant multilateral environmental agreements entered into by UNECE countries and their neighbours, are inventoried (annexes II and III). Therefore, specific attention is devoted to ecological issues, notably through the assessment of selected Ramsar Sites1 and other wetlands of transboundary importance. They also show the linkages between transboundary wetland management and management of transboundary waters.