Welf. & Inst. Code, § 21005

(a) A supported decisionmaking agreement shall be written in plain language accessible to the adult with the disability and shall include, but not be limited to, all of the following:

(1) A list of the areas in which the adult with a disability requests support.

(2) A list of the areas in which the supporter agrees to provide the support.

(3) The supporter’s agreement that they meet each of the requirements specified in Section 21002.

(4) Information advising the adult with a disability about their right to file a report under the Elder Abuse and Dependent Adult Civil Protection Act (Chapter 11 (commencing with Section 15600) of Part 3 of Division 9), including, but not limited to, Sections 15656 and 15657.

(5) Information and copies of other supported or substituted decisionmaking documents the adult with a disability has in place, including, but not limited to, powers of attorney, authorizations to share medical or educational information, authorized representative forms, or representative payee agreements.

(b) A supported decisionmaking agreement shall be signed by the adult with a disability and each supporter, in the presence of two or more attesting and disinterested witnesses who are at least 18 years of age, or a notary public. The adult with a disability may use reasonable modifications, such as assistive technology or physical assistance, to sign the agreement.

(c) A supported decisionmaking agreement should be reviewed by all supporters and the adult with a disability every two years and updated as needed. An updated agreement shall be signed as required in subdivision (b).