The document discusses the UN Watercourses Convention and its importance. The Convention aims to ensure sustainable utilization of international watercourses for present and future generations. It establishes a framework for cooperation on transboundary water resources at multiple levels from local to global. While the Convention has not entered into force yet due to lack of ratification, it still functions to inspire and support existing water agreements, provide guidance for interstate relations in the absence of agreements, and help develop global treaty law on water issues. Over time, more of the Convention's provisions may become established as customary law even for non-parties.