California Code, Probate Code - PROB § 15686

(a) As used in this section, “trustee's fee” includes, but is not limited to, the trustee's periodic base fee, rate of percentage compensation, minimum fee, hourly rate, and transaction charge, but does not include fees for extraordinary services.

(b) A trustee shall not charge an increased trustee's fee for administration of a particular trust unless the trustee first gives at least 60 days' written notice of that increased fee to all of the following persons:

(c) If a beneficiary files a petition under Section 17200 for review of the increased trustee's fee or for removal of the trustee and serves a copy of the petition on the trustee before the expiration of the 60-day period, the increased trustee's fee does not take effect as to that trust until otherwise ordered by the court or the petition is dismissed.