California Code, Probate Code - PROB § 2351.5

(a) Subject to subdivision (b):

(b) A limited conservator does not have any of the following powers or controls over the limited conservatee unless those powers or controls are specifically requested in the petition for appointment of a limited conservator and granted by the court in its order appointing the limited conservator:

(c) Any limited conservator, the limited conservatee, or any relative or friend of the limited conservatee may apply by petition to the superior court of the county in which the proceedings are pending to have the limited conservatorship modified by the elimination or addition of any of the powers which must be specifically granted to the limited conservator pursuant to subdivision (b). The petition shall state the facts alleged to establish that the limited conservatorship should be modified. The granting or elimination of those powers is discretionary with the court. Notice of the hearing on the petition shall be given for the period and in the manner provided in Chapter 3 (commencing with Section 1460) of Part 1.

(d) The limited conservator or any relative or friend of the limited conservatee may appear and oppose the petition. The court shall hear and determine the matter according to the laws and procedures relating to the trial of civil actions, including trial by jury if demanded. If any of the powers which must be specifically granted to the limited conservator pursuant to subdivision (b) are granted or eliminated, new letters of limited conservatorship shall be issued reflecting the change in the limited conservator's powers.