On 25 September, the United Nations General Assembly (UNGA) adopted Resolution 70/1 carrying the 2030 Agenda for Sustainable Development, including seventeen sustainable development goals and relevant targets. Goal 6 on ensuring availability and sustainable management of water and sanitation for all, sets, among others, a target to ‘[b]y 2030, implement integrated water resources management at all levels, including through transboundary cooperation as appropriate’ (Target 6.5, <http://www.un.org/ga/search/view_doc.asp?symbol=A/RES/70/1&Lang=E > (emphasis added)). In Khartoum on 23 March, Egypt, Ethiopia, and Sudan agreed on principles regarding the Grand Ethiopian Renaissance Dam project. The ten agreed principles are cast in rather general terms and span the full spectrum of state practice in the matter of transboundary water resources co-operation. After agreeing to co-operate on the basis of common understanding, good faith, mutual benefit, sovereign equality, and territorial integrity, with a view to achieving optimal utilization and adequate protection of the River Nile (Principles I and IX), the three countries endorsed the principles of no significant harm and equitable and reasonable utilization. In particular, the no harm principle is cast as a due diligence obligation, with room for compensation should significant harm ensue (Principle III). The equitable and reasonable utilization principle is assorted with a detailed list of factors to be taken into account in arriving at equitable-sharing determinations (Principle IV). A dedicated principle is given over to the first filling, and subsequent annual operation, of the Grand Ethiopian Renaissance Dam, which shall be decided in accordance with: the recommendations of an international panel of experts; the final report of the Technical National Committee; and subsequent studies, within an agreed fifteen-month timeline from the inception of two studies recommended by the panel. With a view to ensuring co-ordination in the annual operation of the dam with downstream reservoirs, the countries have directed their respective line ministries responsible for water resources to set up a co-ordination mechanism (Principle V). Downstream countries will have priority in the purchase of power generated by the dam (Principle VI). The three countries shall provide the data and information called for by the joint studies to be carried out under the aegis of the Technical National Committee (Principle VII). To ensure the safety of the dam, Ethiopia commits itself to observing the dam safety measures recommended by the international panel of experts (Principle VIII). Finally, the three countries commit to resolving disputes amicably, through good faith consultation and negotiation, failing which they will jointly resort to conciliation or mediation or refer the matter to the heads of state or government (Principle X).