The vital importance of water to human activity is such that most societies and cultures have sought to establish legal rules over its use and allocation. In most jurisdictions legal rights to water have been linked to land tenure and ownership rights. A number of countries have recently undertaken substantive water law reforms, usually involving the introduction of formal and explicit water rights that clearly specify the volume of water that is subject to each right ("modern water rights"), together with institutional arrangements for their allocation, registration, monitoring and enforcement. Modern water rights are not intrinsically tied to specific land plots, are often transferable and available to be traded on a temporary or permament basis. This book reviews international experiences of the introduction and use of modern water rights. It is based on a survey of relevant primary and secondary legislation, published literature, internet sources and practical experience.