One economic transaction, two registers, two approvals
Water entitlements in the Murray-Darling Basin are state instruments on state registers with state product definitions. A trade across a border is a transfer between two systems for one transaction — and unlike every other instance of this pattern here, there is no national scheme for states to join.
Steps this would change
Rationale
The Murray-Darling Basin Plan is a Commonwealth instrument. The water it plans is not.
Entitlements are issued under state law, held on state registers, traded under state approval and described with state product definitions. A trade within a state is one transaction. A trade across a border is a transfer between two registers, with two approval processes, for instruments that are economically similar and legally distinct.
This is the seventh instance of the partial-national pattern in this database and the odd one out. Elsewhere — community housing registration, worker screening, occupational licensing, clinical credentialing, working with children checks, controlled-medicine prescribing — there is a national scheme that some jurisdictions sit outside. Here there is no national register at all. The Commonwealth plans the water and does not record who holds it.
What that costs. Duplicated approval for one transaction. A trade taking about 96 days on this model, of which the interstate transfer is 45. And, more importantly, the absence of a national view: nobody can answer straightforwardly who holds Basin entitlements, in what proportions, or how holdings have changed — which is a considerable gap in a market the Commonwealth is itself a major buyer in through environmental water recovery.
The proposal. A national register of Basin entitlements — states continuing to issue and approve, but recording to a single view with harmonised product definitions — and mutual recognition of trade approval so that one transaction requires one decision.
What it does not touch. Physical delivery constraints. A trade that cannot be delivered past the Barmah Choke cannot be delivered, and this database keeps hydrology and administration apart deliberately.
Who acts: the Commonwealth and the Basin states, through the same intergovernmental machinery that produced the market reform commencing 1 July 2026.
What is being traded away
Water entitlements are property rights under state law and states will resist this hard. A national register implies national definitions, and national definitions imply the Commonwealth shaping what a state property right is. The constitutional and political sensitivity here exceeds anything else in this database — water has broken intergovernmental agreements before, and the Basin states have very different endowments and interests.
Harmonised product definitions would create winners and losers. Entitlement classes reflect different reliability, different histories and different hydrology. Mapping them to a common taxonomy means someone's high-security entitlement is described in a way that changes how it trades, and the value attached to that description is real money.
A national register makes holdings visible, which some holders will resist for reasons that are not all bad. Transparency of who owns water is a public good and a commercial exposure, and foreign and institutional ownership is a live political issue that a register would sharpen rather than resolve.
And the saving is small. Forty-five days on a 96 day process that is not notably slow. The case for this reform is the national view, not the elapsed time, and it should be argued on that basis — a market the Commonwealth buys in at scale should be one it can see.
Precedent
The new market conduct and reporting obligations commencing 1 July 2026 already establish a Commonwealth interest in how trades are recorded and disclosed. A national view of holdings is the same idea applied to the register rather than the transaction.
Sources
- Water Act 2007 (Cth); state water management legislation issuing and registering entitlements in each Basin state
- ACCC, Murray-Darling Basin water markets inquiry final report, March 2021: 29 recommendations
- Water Amendment (Water Markets Decisions) Regulation 2026, commencing 1 July 2026