Supported Decision-Making in South Dakota: No Statute, Still an Option

South Dakota's SDM Gap — and Why It Matters

More than 20 states have enacted formal supported decision-making (SDM) statutes that require banks, hospitals, and schools to recognize SDM agreements as legal authority. South Dakota is not one of them. As of 2026, the state has not passed a comprehensive SDM law, which means there's no standardized form and no statutory obligation for third parties to honor an SDM agreement.

That doesn't make supported decision-making useless in South Dakota — but it does change the strategy. Families who want to preserve their young adult's autonomy while still providing structured assistance need to understand what SDM can and cannot accomplish without a statutory backbone.

What an SDM Agreement Actually Does

Supported decision-making is a framework where the young adult retains full legal authority over their own life. They choose one or more trusted "supporters" — typically parents, siblings, or close advisors — who help them understand information, weigh options, and communicate decisions. The supporter advises; the individual decides.

A well-drafted SDM agreement in South Dakota should include:

• The young adult's name and the names of each designated supporter
• Specific domains covered — healthcare, finances, education, housing, employment — so supporters and third parties know the scope
• What "support" means — explaining options in plain language, helping gather information, accompanying the individual to appointments, assisting with communication
• What it doesn't mean — the supporter does not make decisions, sign documents, or override the individual's preferences
• Signatures of both the young adult and each supporter, ideally notarized

The agreement is a private contract between the young adult and their supporters. It doesn't need court approval, doesn't cost anything to create, and doesn't remove any of the individual's rights.

The Recognition Problem

Here's where South Dakota's lack of a statute creates friction. When a parent walks into a hospital or bank with an SDM agreement, the institution has no legal obligation to accept it. A hospital might say "we need a healthcare power of attorney or a guardianship order before we can let you participate in medical decisions." A bank might refuse to let a supporter assist with account management without formal financial power of attorney.

This isn't a universal problem — many providers will accept a clearly written SDM agreement, especially if they understand that the young adult is making their own decisions with support rather than delegating authority. But the refusal risk is real, and families should prepare for it.

Making SDM Work Without a Statute

The practical approach in South Dakota is to pair the SDM agreement with legally binding backup instruments:

Layer 1: The SDM agreement. Draft it clearly and professionally. Include a brief explanation of supported decision-making for providers who haven't encountered it before. This becomes the primary operating document for day-to-day decisions.

Layer 2: Durable powers of attorney. If the young adult has the cognitive capacity to understand delegation, execute a durable financial POA under SDCL Chapter 59-12 and a healthcare POA under SDCL 59-7-2.1. These give the supporter legally enforceable authority as a fallback when the SDM agreement alone isn't enough. The POA agents and SDM supporters can be the same people.

Layer 3: Targeted releases. Have the young adult sign specific HIPAA authorizations for medical providers, FERPA releases for educational records, and joint account agreements at the bank. These narrow, institution-specific documents can fill the gaps where an SDM agreement might be questioned.

SDM as Evidence Against Guardianship

Under SDCL 29A-5-302, a South Dakota circuit court must verify that less restrictive alternatives were explored before granting any guardianship order. A functioning SDM agreement is exactly the kind of evidence that demonstrates the young adult's needs are being met without court intervention.

If the family is ever challenged — by a school district, a medical provider, or anyone else who wants a "court order" — documenting that the SDM agreement has been working successfully strengthens the argument that guardianship is unnecessary. Keep records of:

• Appointments where the SDM framework was used
• Decisions the young adult made with supporter assistance
• Third parties who accepted the arrangement
• Any situations where backup instruments (POA, HIPAA release) resolved a recognition issue

This documentation matters. If someone later petitions for guardianship, the family can present a track record of successful supported decision-making to the judge.

When SDM Isn't Enough

Supported decision-making works best for individuals who can express preferences, understand basic concepts with assistance, and engage in the decision-making process. It's not designed for situations where the young adult has such severe cognitive impairments that they cannot participate in decisions at all.

If your young adult cannot indicate preferences, cannot understand the concept of choosing a supporter, or faces immediate safety risks that require someone else to make binding decisions quickly, a limited or full guardianship may be the only viable path. The South Dakota Adult Guardianship & Alternatives Guide includes a decision framework that helps families evaluate where their young adult falls on this spectrum and which combination of instruments provides the right level of support.

The goal is always to start with the least restrictive option and add layers of authority only as the evidence requires. In South Dakota, that means SDM first, POAs second, and court orders as a last resort.

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