What If Family Disagrees With an Advance Health Directive in Western Australia?

Your Family's Opinion Doesn't Override Your AHD

This is the part of WA law that catches most families off guard: a valid Advance Health Directive sits at the absolute top of the statutory hierarchy of treatment decision-makers. It doesn't matter that your daughter is a doctor, that your son flew in from Sydney, or that everyone in the room disagrees with what you wrote. If your AHD applies to the clinical situation and was validly executed, the treating medical team is legally bound to follow it.

That legal clarity doesn't eliminate the emotional reality. Family disagreements over end-of-life treatment are among the most painful conflicts any family faces. Understanding how WA law handles these disputes — and what happens when there's no AHD at all — helps you plan in a way that protects both your wishes and your family relationships.

How the Hierarchy Works During a Dispute

Under Part 9B of the Guardianship and Administration Act 1990, the treatment decision-making hierarchy in Western Australia follows a strict sequence:

1. The patient (if they have capacity — always the first option)
2. A valid Advance Health Directive (binds clinicians for documented treatment decisions)
3. An appointed Enduring Guardian (under an EPG, for decisions the AHD doesn't cover)
4. If no applicable AHD or EPG exists, the first available, willing, and competent person in WA's statutory hierarchy of treatment decision-makers

When family members disagree with an AHD, their objection does not by itself displace it. Questions about validity can include whether the maker had capacity at signing or whether the witnessing requirements were met; other concerns may require legal advice.

If no validity issue applies and the AHD covers the clinical situation, it stands. The family's objection does not, by itself, displace a valid AHD.

What Happens When There's No AHD

The scenario without an AHD is where family disagreements become truly destructive. Without a directive, clinicians must obtain consent from the first available, willing, and competent person on the hierarchy.

This creates two common problems:

The hierarchy elevates people the patient may not have chosen. An estranged spouse who hasn't spoken to the patient in years still sits higher on the list than a devoted adult child. A de facto partner of twenty years ranks below a legal spouse the patient never divorced. These legal rankings don't reflect real relationships — they follow a statutory formula.

Family deadlock stalls treatment. When two adult children disagree about whether Mum should receive aggressive treatment or palliative care, the clinical team faces a decision-making void. Under WA law, the clinician must seek consent from the "first available and willing" person in the hierarchy. If the dispute cannot be resolved through the hierarchy, the matter may need to be referred to the State Administrative Tribunal, and the process can take time the patient may not have.

The State Administrative Tribunal Route

When family conflict reaches a point where treatment decisions are stalled or contested, the matter may need to be referred to the State Administrative Tribunal (SAT) for a determination.

SAT handles several types of disputes:

• Capacity and guardianship questions: The current arrangement is not working or no suitable person can act
• Disputes between an enduring guardian and family members: The appointed guardian wants one thing; the rest of the family wants another
• Applications to appoint or revoke a guardian: When the current arrangement isn't working
• Emergency guardian appointments: When no one in the hierarchy is suitable or willing

SAT operates as an informal, low-cost tribunal — no application fees for guardianship matters, and legal representation isn't required. But the process is emotionally exhausting, and the outcomes can be drastic. If the tribunal finds that family conflict is causing the incapacitated person distress, or that the appointed guardian's record-keeping is poor, SAT can revoke the private EPG and appoint the Public Advocate to make decisions instead. That strips the entire family of decision-making authority.

Preventing Family Conflict Before It Happens

The strongest protection against family disputes is a clear, well-documented AHD combined with an EPG that names a single primary guardian.

Write Specific Treatment Decisions

Vague AHD language — "no extraordinary measures" or "do what's best" — gives family members room to argue about what you meant. Under the WA statutory form, Part 4 requires specific treatment decisions. Write them in concrete clinical terms:

• "I refuse mechanical ventilation if I have an irreversible condition with no reasonable prospect of recovery"
• "I consent to palliative sedation for symptom management if I'm in the terminal phase"
• "I refuse artificial nutrition via PEG tube if I have advanced dementia"

The more specific your instructions, the less room there is for family members to project their own wishes onto your document.

Appoint One Guardian, Not Joint Guardians

WA law allows you to appoint joint enduring guardians under an EPG, but joint guardians must act unanimously. If they can't agree, decision-making stalls — and the matter goes to SAT. A single primary guardian with a named substitute is simpler and more resilient.

Have the Family Conversation

Telling your family what you've decided — and why — before anyone is standing in a hospital corridor is the single most effective conflict-prevention step. Your AHD is legally binding regardless of whether your family agrees with it, but family members who understand your reasoning are far less likely to challenge the document when the time comes. Our guide to talking to family about your advance directive covers conversation strategies.

Document Your Capacity

If you anticipate that a particular family member might challenge your AHD after you lose capacity (perhaps someone who disagrees with your religious views, your relationship choices, or your treatment preferences), get a contemporaneous capacity assessment from your GP and ask them to record it in your medical file. That medical record makes a challenge to your capacity far harder to sustain.

What Clinicians Do When Disputes Arise

WA hospital staff are trained to follow a structured process when family disagreements affect treatment decisions:

1. Check for a valid AHD — if one exists and applies, follow it regardless of family objections
2. Identify the highest-ranking person on the hierarchy who is available and willing to make decisions
3. If no suitable or willing person can act, a health professional can apply to SAT for the urgent appointment of a guardian of last resort
4. The Public Advocate may be appointed to make the necessary treatment decisions

For families, the practical takeaway is that hospitals will not wait indefinitely for family consensus. If treatment decisions are needed and the family can't agree, the clinical team will act — either by following the hierarchy or by seeking SAT intervention.

The Cost of No Plan

The absence of advance care planning documents doesn't mean "no decision gets made." It means someone else — possibly someone you wouldn't have chosen — makes the decision for you, under pressure, without guidance, and potentially over the objections of people who know you best.

The Western Australia Advance Directive & Living Will Kit gives you the tools to make your wishes legally binding and practically enforceable: treatment decision worksheets, the witnessing checklist, guardian appointment guidance, and the Family Conversation Planner that helps you explain your choices to the people who'll be affected by them.

Conflict rarely comes from bad intentions. It comes from uncertainty. Remove the uncertainty, and the conflict has nowhere to grow.

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