12 CFR §150.130

1. (a)Conducting fiduciary activities in more than one state. You may conduct fiduciary activities in any state, subject to the application and notice requirements in § 5.26 of this chapter.
2. (b)Serving customers in more than one state. When you conduct fiduciary activities in a state:
   1. (1)You may market your fiduciary services to, and act as a fiduciary for, customers located in any state, may act as a fiduciary for relationships that include property located in other states, and may act as a testamentary trustee for a testator located in other states.
   2. (2)You may establish or utilize an office in any state to perform activities that are ancillary to your fiduciary business.