There has been a recent Federal Court decision that has changed how SDA funding is being interpreted under the NDIS, and it is worth understanding because it has real flow-on effects for how we all operate.
For a long time, the SDA landscape was shaped by a sense of flexibility. Now, the legal goalposts have shifted, moving us from a period of "creative interpretation" to one of "strict alignment."
The Backdrop: Kirby and the Era of Flexibility
To understand where we are, we have to look at where we were. A previous Tribunal decision, often referred to as Kirby v NDIA, gave the sector a bit of breathing room.
The prevailing view following that case was that the SDA Pricing Arrangements (what most of us still call the Price Guide) didn’t strictly limit what could be funded. The logic was that even if a specific housing configuration wasn’t clearly listed in the guide, you could still argue for it. As long as it met the "reasonable and necessary" test under Section 34 of the NDIS Act, there was a pathway to funding.
This opened the door to different configurations and innovative ways of thinking about SDA, allowing providers and participants to push the boundaries of the framework.
The Shift: NDIA v Caterson
However, the recent Federal Court case, NDIA v Caterson, has now pulled that back.
The Court has effectively ruled that the SDA Pricing Arrangements are not just "helpful guidance" or a mere price list. Instead, they carry significant legal weight in defining what the Scheme will actually fund.
To put it simply: If a dwelling type or configuration is not contemplated within the SDA Pricing Framework, it is not going to be funded even if you can make a rock-solid "reasonable and necessary" argument.
The decision draws a clear line: Reasonable and necessary criteria cannot override the defined boundaries of the SDA funding categories.
What the Caterson Decision Means for SDA
The Caterson decision brings a new level of discipline to the SDA market. Here is how it impacts different stakeholders:
1. For Providers
From a provider’s perspective, this reinforces that "close enough" is no longer good enough. Every project needs to sit cleanly within the recognised framework:
Design Category: (e.g., Improved Liveability, Robust, High Physical Support).
Building Type: (e.g., Apartment, Villa, House).
Participant Configuration: The number of residents must match the funding model.
There is now significantly less room to rely on creative structuring to get a project across the line. If it’s not in the book, it’s likely not in the budget.
2. For Support Coordinators and Participants
For those navigating the application process, the pathway has become narrower but arguably clearer. You are no longer trying to "find a way" through grey areas or testing the limits of the NDIA's discretion.
While it might feel restrictive to lose that flexibility, working within a defined framework usually leads to better outcomes in the long run. When the property design, the funding request, and the participant's application all line up perfectly from the start, the process moves faster and with far less friction.
Conclusion
The Caterson decision marks a maturing of the SDA sector. While the era of "testing the boundaries" may be closing, it is being replaced by a more predictable, albeit stricter, framework. For providers and participants alike, success now hinges on precision.
