Can Doctors Override an Advance Care Directive in South Australia?

The Short Answer: Usually No, But There Are Exceptions

A legally valid Advance Care Directive in South Australia carries genuine legal force. Under the Advance Care Directives Act 2013, clinicians who refuse to follow a binding provision face potential legal consequences. The Act was written to protect patient autonomy — your right to decide what happens to your body.

But the legal framework isn't absolute. There are specific circumstances where doctors can lawfully act against what your ACD says, and understanding these exceptions matters because they come up more often than people expect.

When Doctors Must Follow Your ACD

If your ACD contains a binding provision — a specific refusal of medical treatment with enough clinical precision to be actionable — the medical team is legally required to follow it once your capacity has been assessed as impaired and the clinical circumstances described in the provision apply.

The key requirement is precision. "I refuse mechanical ventilation if I have an irreversible terminal illness with no reasonable prospect of recovery" is a binding provision. The clinician checks: does the patient have a terminal illness? Is it irreversible? Is there no reasonable prospect of recovery? If yes to all three, the refusal applies, subject to statutory exceptions such as suspected suicide or self-harm.

When its conditions apply, a valid binding refusal cannot simply be disregarded; the Act requires it to be followed, subject to statutory exceptions.

Exception 1: The Instruction Is Too Vague

This is the most common reason directives get set aside, and it's a design feature of the Act, not a loophole.

If your instruction is too broad or ambiguous for a clinician to act on with confidence, it's automatically classified as a non-binding value statement. The medical team should consider it, and your SDM should try to honour it, but it doesn't compel specific action.

"No heroic measures," "let me die with dignity," "pull the plug if there's no hope" — these are all value statements. They express what you want, but they don't tell the treating team exactly what treatment to withhold under what clinical conditions.

In practice, this means the instruction gets noted in the file, discussed with the family, and weighed alongside clinical judgment. The treating team should seek consent from the appointed SDM; if there is no ACD or SDM, the statutory "Person Responsible" hierarchy applies.

Exception 2: The 2024 Suicide Override

The Advance Care Directives (Review) Amendment Act 2023, which took effect on 1 March 2024, created a specific statutory exception for suspected suicide and self-harm.

If a clinician reasonably suspects that a patient's life-threatening condition was caused by attempted suicide or self-harm, they can administer life-saving treatment despite a binding refusal in the patient's ACD.

This addresses a genuine clinical dilemma. The amendment gives clinicians clear legal authority to intervene in these specific circumstances without facing liability for overriding the ACD.

The override is narrow. It applies only when suicide or self-harm is reasonably suspected as the cause of the life-threatening condition. It doesn't give doctors a general power to override binding refusals whenever they disagree with the patient's choices.

Exception 3: Medical Futility

Even without the ACD framework, doctors in South Australia are never legally obligated to provide treatment they consider medically futile or non-beneficial. This principle comes from the Consent to Medical Treatment and Palliative Care Act 1995 and general medical law — it predates the ACD legislation.

What this means in practice: if a patient's ACD says "I want all available treatments attempted" and the clinical team determines that CPR would cause suffering without any realistic chance of benefit (for instance, in a patient with end-stage multi-organ failure), the clinician can write a "not for CPR" clinical order despite the patient's expressed preference.

The ACD protects your right to refuse treatment. It doesn't create a right to demand treatment that a qualified medical practitioner considers futile.

Exception 4: Evidence the Person Changed Their Mind

If there's reliable evidence that the person revoked or wanted to change their ACD after executing it — but before losing capacity — clinicians may question whether the directive still reflects the person's wishes. This isn't an easy out for doctors; the evidence needs to be substantial and reliable. A casual comment to a family member doesn't automatically override a formally executed statutory document.

If there's a genuine dispute about whether the person changed their mind, the matter can be referred to SACAT (the South Australian Civil and Administrative Tribunal) for resolution. SACAT has the power to declare whether an ACD is valid and whether its provisions should continue to apply.

What Happens When a Clinician Won't Follow Your ACD

If a healthcare provider believes a binding refusal is unclear or that an exception may apply, the practical next steps are:

• Explain and document why the refusal is considered unclear or why an exception may apply
• Involve your SDM; if there is no SDM, use the statutory "Person Responsible" hierarchy
• If the disagreement can't be resolved, seek OPA assistance and, if necessary, apply to SACAT for a determination

In practice, bedside disputes between clinical teams and families are often resolved through discussion and compromise before reaching the tribunal stage. But the legal pathway exists when resolution isn't possible.

How to Protect Your Wishes

The best protection against your ACD being set aside is drafting it with clinical precision from the start:

• Be specific about treatments — name the interventions you refuse
• Be specific about circumstances — describe the clinical conditions under which each refusal applies
• Don't rely on vague language — "no heroic measures" isn't enforceable
• Upload to My Health Record — ensure the clinical team can find your ACD quickly
• Discuss it with your GP — they can help translate your values into clinical language and flag your ACD in their records
• Brief your SDM thoroughly — when the binding provision doesn't perfectly match the clinical scenario, your SDM bridges the gap

Our South Australia Advance Directive & Living Will Kit provides clinically precise drafting examples for the most common treatment refusal scenarios, along with a doctor conversation guide — so your instructions are specific enough to qualify as binding provisions that clinicians are legally required to follow.

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