Cal. Prob. Code § 16015

The provision of services for compensation by a regulated financial institution or its affiliates in the ordinary course of business either to a trust of which it also acts as trustee or to a person dealing with the trust is not a violation of the duty provided in Section 16002 or 16004. For the purposes of this section, “affiliate” means a corporation that directly or indirectly through one or more intermediaries controls, is controlled by, or is under common control with another domestic or foreign corporation.