California Code, Probate Code - PROB § 2614.8

At any time on or after one year from the submission of an hourly fee schedule or another statement of proposed compensation under this section or under Section 1510, 1821, 2250, or 2614.7, a guardian or conservator who is a professional fiduciary may submit a new proposed hourly fee schedule or another statement of his or her proposed compensation from the estate of the proposed ward or proposed conservatee.  The submittal of a new hourly fee schedule or another statement of the guardian's or conservator's proposed compensation, as authorized by this section, shall not preclude a court from later reducing the guardian's or conservator's hourly fees or other compensation, or his or her attorney's fees or other compensation.