Substitute Decision Maker Newfoundland: How to Choose and Appoint a Healthcare Proxy

What a Substitute Decision Maker Does in NL

A Substitute Decision Maker (SDM) is the person legally authorized to make healthcare decisions on your behalf when you no longer have the capacity to make them yourself. In Newfoundland and Labrador, the SDM role is created through an Advance Health Care Directive (AHCD) under the Advance Health Care Directives Act, 1995.

The SDM's authority is strictly limited to healthcare and personal care decisions. They cannot access your bank accounts, sell your property, or manage your financial affairs — that requires a separate Enduring Power of Attorney. These two instruments are legally separate in this province, and confusing them causes real problems.

Eligibility Requirements

The rules for who can serve as your SDM are straightforward but inflexible:

• Must be at least 19 years old — even though you can generally create an AHCD at age 16, a mature minor under 16 may qualify if assessed as understanding the implications; your SDM must have reached the provincial age of majority
• Must accept the appointment in writing — this is a requirement unique to Newfoundland; the SDM signs a written acceptance directly on the directive itself
• Must not witness the directive — and neither can the SDM's spouse

The Act permits naming one or more SDMs. Choose a trusted person who can be reached and who understands your wishes; if naming more than one, state clearly how they should act together.

How to Choose the Right Person

The practical demands of the role matter more than the legal eligibility. Your SDM may face high-pressure decisions in emergency settings with incomplete information. Consider:

Emotional resilience. Your SDM will need to make decisions about life-sustaining treatment, pain management, and potentially end-of-life care while watching someone they care about suffer. Not everyone can handle this, and there's no shame in acknowledging that.

Proximity and availability. When a clinical team needs a decision, they need it within hours — sometimes minutes. An SDM who lives in Alberta while you're in a hospital in Corner Brook creates logistical delays that can affect your care. Physical proximity to the province matters, particularly since Newfoundland doesn't have a centralized digital system for real-time proxy communication.

Willingness to advocate. The SDM is legally bound to follow your written instructions first. When your instructions are silent on a specific clinical issue, they must decide based on your known values and beliefs. This requires someone who genuinely understands your preferences about pain, dignity, independence, and quality of life — and who is willing to push back against family members or clinicians who disagree.

Family dynamics. If you have a blended family, estranged relatives, or contentious relationships, choosing the wrong SDM can create disputes. If you appoint no one, the province defaults to the statutory list of nearest relatives. Equal-ranking relatives who disagree can create medical gridlock where no decision gets made.

The Written Acceptance Requirement

This is the step that catches most people. In other provinces, naming someone as your healthcare proxy is often enough — they're assumed to accept the role. In Newfoundland, your SDM must formally sign a written acceptance on the AHCD itself.

Plan your signing day accordingly. You, your SDM, and your two witnesses all need to be physically present at the same time and place. The SDM signs the acceptance, you sign the directive, and both witnesses observe everything.

If your SDM later changes their mind and no longer wants to serve, do not rely on that person continuing to serve. You should execute a new AHCD naming an alternative SDM as soon as possible.

What Happens If You Don't Appoint One

If you lose capacity without a valid AHCD appointing an SDM, the healthcare team must follow the statutory list of nearest relatives in the Act. When multiple relatives have equal standing and disagree, the medical team can be left without clear direction.

This is why explicitly appointing an SDM and documenting your wishes are protective steps.

The SDM's Legal Obligations

Once activated (meaning you've been clinically assessed as lacking capacity), your SDM is legally bound to:

1. Follow your written instructions in the AHCD as closely as possible
2. Apply your known values and beliefs when the written instructions don't address a specific situation

The SDM cannot consent to Medical Assistance in Dying (MAiD) on your behalf — that requires your own contemporaneous, conscious consent under federal criminal law.

The SDM also cannot compel a clinician to perform an act that is illegal or unethical. If there's a disagreement between the SDM and the medical team about a course of treatment, ask the clinical team to explain the issue and seek local legal or clinical advice.

Preparing Your SDM for the Role

Appointing someone is the legal step. Preparing them is the practical one. Have a detailed conversation about:

• What "quality of life" means to you
• Your views on ventilators, feeding tubes, dialysis, and resuscitation
• Whether you want aggressive treatment in the hope of recovery or comfort-focused care
• Your spiritual or cultural values around dying
• Where you want to receive care if possible (home, hospital, personal care home)

Document these conversations. The more specific your written instructions and the more context your SDM has about your values, the more confidently they can act when the moment arrives.

The Newfoundland and Labrador Advance Directive & Living Will Kit includes an SDM selection worksheet, a values conversation guide, and the written acceptance template — all designed for the specific requirements of the Advance Health Care Directives Act, 1995.

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