California Code, Probate Code - PROB § 2644

(a) Where it is to the advantage, benefit, and best interest of the ward or conservatee or the estate, the guardian or conservator of the estate may contract with an attorney for a contingent fee for the attorney's services in representing the ward or conservatee or the estate in connection with a matter that is of a type that is customarily the subject of a contingent fee contract, but such a contract is valid only if (1) the contract is made pursuant to an order of the court authorizing the guardian or conservator to execute the contract or (2) the contract is approved by order of the court.

(b) To obtain an order under this section, the guardian or conservator shall file a petition with the court showing the advantage, benefit, and best interest to the ward or conservatee or the estate of the contingent fee contract.  A copy of the contingent fee contract shall be attached to the petition.

(c) 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) As used in this section, “court” includes either of the following: