Cal. PROB § 1890

(a) An order of the court under Section 1880 may be included in the order of appointment of the conservator if the order was requested in the petition for the appointment of the conservator or the transfer petition under Section 2002 or, except in the case of a limited conservator, may be made subsequently upon a petition made, noticed, and heard by the court in the manner provided in this article.

(b) In the case of a petition filed under this chapter requesting that the court make an order under this chapter or that the court modify or revoke an order made under this chapter, when the order applies to a limited conservatee, the order may only be made upon a petition made, noticed, and heard by the court in the manner provided by Article 3 (commencing with Section 1820) of Chapter 1.

(c) No court order under Section 1880, whether issued as part of an order granting the original petition for appointment of a conservator or issued subsequent thereto, may be granted unless supported by a declaration, filed at or before the hearing on the request, executed by a licensed physician, or a licensed psychologist within the scope of his or her licensure, and stating that the proposed conservatee or the conservatee, as the case may be, lacks the capacity to give an informed consent for any form of medical treatment and the reasons therefor. Nothing in this section shall be construed to expand the scope of practice of psychologists as set forth in the Business and Professions Code.