ABSTRACT. Indigenous involvement in Australian water management is conventionally driven by a top-down approach by nonIndigenous government agencies, that asks "how do we engage Indigenous people?" and has culminated in the ineffective "consult" and "service delivery" processes evident in mainstream water management planning. This is a hopeful paper that identifies the critical importance of a "nation-based" approach for effective Indigenous engagement in water planning and policy through the work undertaken by the Ngarrindjeri Regional Authority (NRA) in the Murray Futures program. The NRA is an Indigenous government in the "settled-south" of Australia. Over past decades, the NRA has developed a range of political technologies that act as tools for redeveloping Ngarrindjeri Nationhood after colonial disempowerment and dispossession. These tools enable better collaboration with nonIndigenous governments, especially in natural resource management policy and practice. In turn, this has better enabled the NRA to exercise a decision-making and planning authority over the lands and waters in its jurisdiction, therefore, more effectively exercising its ongoing duty of care as Country. This paper presents a case study of the Sugar Shack Complex Management Plan, codeveloped by the NRA and the South Australian Government in 2015, to demonstrate the benefits that accrue when Indigenous nations are resourced as authorities responsible for reframing water management and planning approaches to facilitate the equitable collaboration of Indigenous and nonIndigenous worldviews. As a marker of the success of this strategy, the Ngarrindjeri Yarluwar-Ruwe Program, in partnership with the South Australian government, recently won the Australian Riverprize 2015 for delivering excellence in Australian river management. The Ngarrindjeri "Vision for Country" quoted above encapsulates the Ngarrindjeri philosophy of being (Ruwe/Ruwar) at the center of Ngarrindjeri innovations in water management. Its ancient but radical message has far-reaching implications for Australian water planning. Originally developed as part of the whole-of-country strategy expressed in the Ngarrindjeri Nation Yarluwar-Ruwe Plan (Ngarrindjeri Nation 2007), it asserts a sovereign vision for healthy Ngarrindjeri country, based on valuing Ngarrindjeri lifeways, values, and knowledge. Ngarrindjeri country is in the "settled south" of Australia, at the end of the iconic River Murray (Murrundi), the longest river in Australia and third longest navigable river in the world.Freshwater flows through the Murray-Darling system into Ngarrindjeri lands are, for Ngarrindjeri, the life blood of the living body of Murrundi. The mouth of the Murray and its nearby region is a place of great spiritual and cultural significance known and formally registered as the "Meeting of the Waters" where the salt and fresh waters mix. For Ngarrindjeri, the reproduction of wellbeing is inextricably linked to interconnectivity, estuarine mixing, and the overall health of Murrundi as a living bod...