(a) Subject to the provisions of this part, in addition to the compensation provided by Section 10810, the court may allow additional compensation for extraordinary services by the attorney for the personal representative in an amount the court determines is just and reasonable.
(b) Extraordinary services by the attorney for which the court may allow compensation include services by a paralegal performing the extraordinary services under the direction and supervision of an attorney. The petition for compensation shall set forth the hours spent and services performed by the paralegal.
(c) An attorney for the personal representative may agree to perform extraordinary service on a contingent fee basis subject to the following conditions:
(1) The agreement is written and complies with all the requirements of Section 6147 of the Business and Professions Code.
(2) The agreement is approved by the court following a hearing noticed as provided in Section 10812.
(3) The court determines that the compensation provided in the agreement is just and reasonable and the agreement is to the advantage of the estate and in the best interests of the persons who are interested in the estate.