For the purposes of this chapter, the following terms have the following meanings:
(1) SUPPORTED DECISION-MAKING. The process of supporting and accommodating an adult in the decision-making process without impeding the self-determination of the adult. This term includes assistance in making, communicating, and effectuating life decisions.
(2) SUPPORTED DECISION-MAKING AGREEMENT. A written agreement detailing decision-making supports and accommodations that an adult chooses to receive from one or more supporters.
(3) SUPPORTER. An individual at least 18 years of age who has voluntarily entered into a supported decision-making agreement with an adult and is designated as such in a supported decision-making agreement.