Cal. PROB § 2113

A conservator shall accommodate the desires of the conservatee, except to the extent that doing so would violate the conservator’s fiduciary duties to the conservatee or impose an unreasonable expense on the conservatorship estate. To the greatest extent possible, the conservator shall support the conservatee to maximize their autonomy, support the conservatee in making decisions, and, on a regular basis, inform the conservatee of decisions made on their behalf. In determining the desires of the conservatee, the conservator shall consider stated or previously expressed preferences, including preferences expressed by speech, sign language, alternative or augmentative communication, actions, facial expressions, and other spoken and nonspoken methods of communication.