(a) A supporter may exercise the authority granted to the supporter in the supported decision-making agreement.
(b) The supporter owes to the adult with a disability fiduciary duties as listed in the form provided by Section 1357.056(a), regardless of whether that form is used for the supported decision-making agreement.

(c) The relationship between an adult with a disability and the supporter with whom the adult enters into a supported decision-making agreement:
(1) is one of trust and confidence; and
(2) does not undermine the decision-making authority of the adult.