As a result, this intense questioning reflects the current stage and evolution of the Brazilian society and new requisites brought by economic growth and social development. From the point of abstraction of water for any sort of use, up to the extremities of the river basin (and beyond), there is a full span of administrative and political boundaries that correspond to institutions that are relevant and have a say in the management process. In this context, clearly mapping of the responsible authorities and their duties is essential, as is the effective management of their interdependences and interactions (Figure 2.3).