Medical Consent Hierarchy Victoria: Who Makes Decisions When You Can't
The Statutory Hierarchy Kicks In When You Haven't Planned
If you lose decision-making capacity in a Victorian hospital and you haven't appointed a Medical Treatment Decision Maker or created an advance care directive, the Medical Treatment Planning and Decisions Act 2016 dictates who makes medical decisions for you. The treating clinician must locate the first willing and available person in a fixed statutory order — they don't get to choose, and neither does your family.
This hierarchy exists as a safety net, but it's a blunt instrument. It doesn't account for relationship quality, family dynamics, or your actual preferences about who should be making these calls.
The Exact Order
The 2016 Act establishes this decision-making hierarchy:
- Formally appointed Medical Treatment Decision Maker (or their nominated alternative if the primary MTDM is unavailable).
- A guardian appointed by VCAT with authority for medical treatment decisions.
- The first willing and available person in the statutory nearest-relative list, who must have a close and continuing relationship with the patient:
- Spouse or domestic partner (including de facto and same-sex partners)
- Primary unpaid carer
- Oldest adult child
- Oldest parent
- Oldest adult sibling
The clinician works down the list and stops at the first person who is available, willing, and has a close and continuing relationship. That person makes the decision — it's not a family vote.
How De Facto and Same-Sex Partners Are Recognised
De facto partners — including same-sex partners — sit at the top of the statutory nearest-relative list, on equal footing with legally married spouses. Victoria's Relationships Act 2008 defines a domestic partner as a person in a registered relationship or a person who has been living with the patient as a couple on a genuine domestic basis, regardless of gender.
In practice, though, recognition can be complicated during a medical crisis. A married spouse can produce a marriage certificate. A de facto partner may need to demonstrate that the relationship meets the "close and continuing" threshold — particularly if estranged family members contest their standing.
The reality in emergency departments is that clinical teams under pressure may default to the person who presents as "next of kin" without rigorous verification. For de facto and same-sex partners, this creates a risk: if a biological family member arrives and claims authority, the clinical team may not immediately know how to resolve the competing claims.
Formally appointing each other as MTDMs eliminates this ambiguity entirely. The MTDM appointment is a legal document that sits above the entire statutory hierarchy — no one needs to prove relationship status or argue about standing.
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The "Close and Continuing Relationship" Requirement
Not everyone in the statutory list automatically qualifies. The 2016 Act requires that the person must have a "close and continuing relationship" with the patient. This matters because:
- An estranged spouse who is still legally married but hasn't had contact in years technically sits at the top of the hierarchy. Whether they meet the "close and continuing" threshold is a factual question that the treating clinician must assess — and it's exactly the kind of question nobody wants to resolve in an ICU waiting room.
- An adult child who lives overseas may not meet the threshold if they haven't maintained regular contact.
- A primary carer (unpaid) who has been providing daily care outranks adult children, recognising the intimacy and practical knowledge that comes with hands-on caregiving.
What Happens When No One Is Available
If the treating clinician works through the entire hierarchy and cannot identify a willing, available person with a close and continuing relationship, they must contact the Office of the Public Advocate (OPA). The Public Advocate has statutory authority under Section 63 of the 2016 Act to act as the decision-maker of last resort.
This typically happens with isolated patients — people without close family or whose family members cannot be located in time. The Public Advocate's involvement is a formal process that adds time to an already urgent situation.
Why the Hierarchy Often Fails Families
The statutory hierarchy is based on relationship categories, not relationship quality. It can produce outcomes that directly contradict what the patient would have wanted:
- Your closest confidant might be a friend, not a blood relative — friends don't appear anywhere in the hierarchy.
- Your estranged parent may outrank your devoted partner if the relationship isn't registered.
- Sibling rivalry can turn a medical decision into a family power struggle, with the "oldest adult sibling" designation creating resentment.
These aren't edge cases. They're common family structures — blended families, estranged relatives, close friendships, unmarried partnerships — that the statutory hierarchy handles poorly because it's built around legal categories, not lived relationships.
Taking Control of Who Decides
The hierarchy only applies when you haven't made your own arrangements. Two documents change the picture entirely:
An MTDM appointment lets you choose exactly who makes medical decisions for you. That person sits above the entire statutory hierarchy — above your spouse, above your children, above everyone. You can choose your best friend, your partner, your adult child, your sibling — whoever you trust most with these decisions.
An advance care directive with instructional directives takes certain decisions off the table entirely. If you've documented a binding refusal of CPR, nobody in the hierarchy needs to make that call — your written instruction stands.
The Victoria Advance Directive & Living Will Kit walks through both documents with step-by-step checklists, including guidance on choosing an MTDM and drafting instructional directives for common medical scenarios.
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