Substitute House Bill No. 5485, also known as Special Act No. 26-12, establishes a framework for supported decision-making, allowing adults to retain decision-making authority with the assistance of chosen supporters. The bill defines key terms such as "adult," "decision-maker," "supported decision-making," "supported decision-making agreement," and "supporter." A supported decision-making agreement must be in writing, dated, voluntarily entered into by the decision-maker, signed by the decision-maker and supporters, and include the types of decisions for which support is provided.

The bill mandates the formation of a working group appointed by the House and Senate chairpersons of the joint standing committee on human services. This group will study and make recommendations on various aspects of supported decision-making, including documentation for financial transactions, the role of supporters in healthcare settings, protection of health information, and safeguards against conflicts of interest. The working group will consist of representatives from relevant organizations and individuals, and it is required to submit a report with recommendations by December 31, 2026.