Healthcare Decision-Making NSW: Who Decides If You Can't?

If you hold an enduring power of attorney for your parent and they are admitted to hospital unable to speak for themselves, you might assume you can consent to their surgery. In New South Wales, you cannot. A financial power of attorney gives you zero authority over medical treatment. This catches families off guard at exactly the wrong moment.

Why a Power of Attorney Does Not Cover Health Decisions

NSW operates a split decision-making framework. Financial and property authority sits under the Powers of Attorney Act 2003. Healthcare, accommodation, and personal lifestyle decisions are governed by an entirely separate law — the Guardianship Act 1987.

An enduring power of attorney allows your attorney to manage bank accounts, pay bills, sell property, and handle investments. It does not extend to consenting to medical procedures, choosing an aged care facility, deciding on a nursing home placement, or refusing life-sustaining treatment.

If you want someone to make healthcare decisions for you when you cannot, NSW requires a separate document: the Appointment of Enduring Guardian.

The Enduring Guardian

An enduring guardian is appointed specifically to make personal, lifestyle, and healthcare decisions for you if you lose capacity. Their authority can include consenting to medical and dental treatment, deciding where you live, determining what personal services you receive, and making decisions about restrictive practices in aged care.

The appointment is made using the prescribed form under the Guardianship Act. Like the enduring power of attorney, it must be signed in front of a prescribed witness — a solicitor, a Local Court Registrar, or an approved employee of NSW Trustee & Guardian. The guardian's authority only activates when a medical practitioner certifies that you have lost the capacity to make your own personal and lifestyle decisions.

You can give your enduring guardian broad authority or limit their powers to specific types of decisions. You can also include directions — instructions about your preferences that the guardian must consider when making decisions, though they are not absolutely bound by them if circumstances have changed significantly.

The "Person Responsible" Hierarchy

What happens when someone has no enduring guardian and loses the ability to consent to medical treatment? NSW law provides a fallback through the "person responsible" hierarchy under Section 33A of the Guardianship Act.

For routine medical or dental treatment, hospitals will look for the most appropriate person to give consent, working down this statutory order:

1. A guardian appointed by NCAT (if one exists)
2. The person's spouse or de facto partner (including same-sex partners)
3. A carer of the person who is unpaid and not a service provider
4. A close friend or relative

The person responsible can consent to most standard treatments. They cannot, however, consent to special medical treatment (such as sterilisation or termination of pregnancy for a non-medical reason), and they may face difficulties with decisions about restrictive practices or disputed treatment plans.

If no person responsible can be identified, or if the decision is contested, the hospital must escalate to the Guardianship Division of NCAT for a determination.

Advance Care Directives in NSW

NSW has no standalone legislation for advance care directives. Instead, written advance care directives are recognised under common law — meaning their authority comes from court precedent rather than a specific statute.

An advance care directive allows you to record specific treatment preferences and refusals while you still have capacity. It is not a substitute for appointing an enduring guardian; it complements one. Your guardian makes real-time decisions about options that arise. Your advance care directive records decisions you have already made — typically about end-of-life treatment, palliative care preferences, or specific procedures you want refused.

For a written advance care directive to carry weight in a clinical setting, it should be clear, specific, signed, and ideally witnessed by your GP. Vague statements like "I don't want heroic measures" are difficult for clinicians to interpret. Specific statements about ventilation, resuscitation, artificial nutrition, and dialysis are far more useful.

The Gap That Causes Crisis

The most dangerous gap in NSW healthcare decision-making is having a financial power of attorney but no enduring guardian or advance care directive. The family assumes someone has authority to manage everything. The hospital asks who can consent to a procedure. The family produces the enduring power of attorney. The hospital explains that it only covers finances.

At that point, the options narrow. If the treatment is routine, the person responsible hierarchy may resolve it. If the decision is contested, complex, or involves aged care placement, someone must apply to NCAT for a guardianship order — a process that takes four to six weeks for a standard hearing, or 24 to 48 hours for an emergency. During that wait, medical decisions may be delayed or defaulted to the treating team's clinical judgement.

Putting All Three Documents Together

Complete substitute decision-making protection in NSW requires three documents working in parallel:

• Enduring power of attorney — finances, property, banking, investments
• Appointment of enduring guardian — healthcare, accommodation, personal services
• Advance care directive — specific treatment preferences recorded in your own words

All three can be prepared at the same time, signed in the same appointment with a prescribed witness, and distributed together. The New South Wales Power of Attorney Kit covers the full three-document framework, including worksheets for coordinating your financial attorney and enduring guardian so they work together rather than at cross purposes.

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