California Code, Probate Code - PROB § 2500

(a) Unless this article or some other applicable statute requires court authorization or approval, if it is to the advantage of the estate, the guardian or conservator may do any of the following without court authorization, instruction, approval, or confirmation:

(b) Nothing in this section precludes the guardian or conservator from seeking court authorization, instructions, approval, or confirmation pursuant to Section 2403.

(c) Upon petition of the ward or conservatee, a creditor, or any interested person, or upon the court's own motion, the court may limit the authority of the guardian or conservator under subdivision (a). 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.