Section 1357.055 - Authorizing and Witnessing of Supported Decision-Making Agreement(a) A supported decision-making agreement must be signed voluntarily, without coercion or undue influence, by the adult with a disability and the supporter in the presence of two or more subscribing witnesses or a notary public.(b) If signed before two witnesses, the attesting witnesses must be at least 14 years of age.Added by Acts 2015, Texas Acts of the 84th Leg. - Regular Session, ch. 1224,Sec. 1, eff. 6/19/2015.Added by Acts 2015, Texas Acts of the 84th Leg. - Regular Session, ch. 214,Sec. 23, eff. 9/1/2015.