Under the Ontario Health Care Consent Act, a Substitute Decision-Maker (SDM) appointed in your Power of Attorney for Personal Care has the extreme legal authority to refuse life-saving medical treatments on your behalf, provided they are honoring your explicit prior capable wishes.
When a severe stroke, traumatic brain injury, or advanced dementia renders a person unable to communicate, the responsibility for their medical care falls to others. In Ontario, doctors cannot simply impose medical treatments without informed consent, even in life-or-death situations. If you are incapacitated, that consent must come from your legally appointed representative. This makes the Power of Attorney (POA) for Personal Care one of the most powerful legal documents you can sign during your lifetime.
The authority granted to a Substitute Decision-Maker (SDM) is profound. 📍 They have the legal right to consent to surgeries, admit you to a long-term care centre in London or Mississauga, and, crucially, refuse artificial life support. Because this power literally deals with life and death, drafting a clear and highly specific POA is vital. Working with a dedicated Ontario law firm ensures that your document correctly captures your exact wishes, leaving no room for hospital staff or family members to misinterpret your intentions.
Step-by-Step Process for Exercising a POA in Medical Crises
When an emergency occurs, the transition of decision-making power follows strict rules set out by Ontario’s Health Care Consent Act. Here is how your SDM legally steps into your shoes.
Step 1: The Finding of Incapacity
The process does not begin until you lose mental capacity. A Power of Attorney for Personal Care only becomes active when an Ontario physician or evaluated medical professional formally determines that you are incapable of understanding the proposed medical treatment and appreciating the consequences of accepting or refusing it.
Step 2: Activating the Substitute Decision-Maker (SDM)
Once incapacity is documented in your medical chart, the hospital staff will look for your POA. 📝 Your appointed SDM must present the original or a notarized copy of the Power of Attorney for Personal Care to the attending doctor. From that moment, the SDM becomes your legal voice for all health-related choices.
Step 3: Evaluating the Prior Capable Wishes
The SDM does not have the freedom to make whatever choice they personally prefer. By law, they must base their decisions on any clear, “prior capable wishes” you expressed when you were healthy. If your POA contains a clause refusing ventilators or feeding tubes under specific terminal conditions, the SDM must present these written instructions to the medical team.
Step 4: Refusing the Treatment
If the proposed medical intervention conflicts with your written advance directives, the SDM will formally refuse consent on your behalf. 🚨 In Ontario, doctors generally must respect this refusal, even if it means the patient will pass away. The medical team will pivot from active life-saving measures to providing palliative comfort care.
Step 5: Intervention by the Consent and Capacity Board (CCB)
If a dispute arises-for example, if a doctor believes your SDM is not following your true wishes, or if family members disagree with the SDM’s refusal of treatment-the matter can be escalated. The case is brought before the Ontario Consent and Capacity Board (CCB), an independent provincial tribunal that holds emergency hearings to determine who is making the legally correct medical decision.
How Much Does it Cost in Ontario?
Drafting a legally sound POA for Personal Care is a small investment that provides immense protection during high-stakes medical crises.
| Legal / Medical Action | Estimated Cost (CAD) | Details |
|---|---|---|
| Drafting a Personal Care POA | $250 to $600+ | Lawyer fees to draft a customized POA with detailed treatment refusal clauses. |
| CCB Tribunal Hearing | $0 for the Tribunal | There is no filing fee to bring a dispute to the Consent and Capacity Board in Ontario. |
| Legal Representation at CCB | $3,000 to $10,000+ | If family members hire lawyers to argue over the SDM’s medical decisions at the tribunal. |
| Capacity Assessment | $500 to $1,500 | Cost to hire a designated capacity assessor if your mental state is highly contested. |
Clear, professionally drafted instructions are the best way to avoid the massive legal fees associated with contested CCB hearings.
How Long Does the Process Take?
In a medical crisis, decisions are made rapidly. A doctor’s finding of incapacity and the activation of the SDM can happen within minutes or hours in an intensive care unit. If a dispute arises and an application is made to the Consent and Capacity Board, Ontario law mandates that the tribunal must hold a hearing within 7 days to ensure emergency treatments are not unlawfully delayed.
Frequently Asked Questions (FAQ)
Can a doctor ignore my SDM’s refusal of treatment?
Generally, no. A doctor cannot overrule an SDM’s refusal. However, if the doctor firmly believes the SDM is not acting in accordance with your prior capable wishes or your best interests, the doctor must apply to the Consent and Capacity Board for permission to proceed with treatment.
What happens if I don’t write down any wishes?
If you have no written advance directives, your SDM must make medical decisions based on your “best interests.” This takes into account your values, your current medical condition, and whether the treatment will actually improve your life, which can be a very heavy burden for the SDM.
Can my spouse override the person I appointed in my POA?
No. If you formally named someone else (like an adult child or a friend) as your SDM in a valid Power of Attorney for Personal Care, they have legal priority over your spouse. Your spouse cannot legally override their medical decisions.
Does a POA allow my SDM to request Medical Assistance in Dying (MAID)?
No. Under Canadian federal law, an individual must be mentally capable to request and consent to Medical Assistance in Dying (MAID). An SDM cannot consent to MAID on your behalf, nor can you use an advance directive in your POA to order it after you lose capacity.
Can I appoint two people to act as my SDM together?
Yes, you can appoint multiple people to act “jointly” (must agree on all decisions) or “jointly and severally” (either can act alone). However, appointing people jointly can cause dangerous delays if they disagree on whether to refuse medical treatment.
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