This chapter contains sections titled: Towards Integrated Management of Transboundary River Basins over the World Antarctic Subglacial Lakes and Waters: The Challenge to Protect a Hidden Resource Progressive Development of International Groundwater Law: Awareness and Cooperation The Role of Key International Water Treaties in the Implementation of the Convention on Biological Diversity The European Union Water Framework Directive, a Driving Force for Shared Water Resources Management Transfer of Integrated Water Resources Management Principles to Non-European Union Transboundary River Basins Implementation of the Water Framework Directive Concepts at the Frontiers of Europe for Transboundary Water Resources Management Implementation of the European Union Water Framework Directive in Non-EU Countries: Serbia in the Danube River Basin Basic Problems and Prerequisites Regarding Transboundary Integrated Water Resources Management in South East Europe: The Case of the River Evros/Maritza/Meriç References Further Reading