(a) A state trust institution may act as a fiduciary and engage in a trust business at each trust office as permitted by this chapter and at a branch.
(b) Notwithstanding the foregoing subsection (a) of this section, a state bank or a state trust company may not engage at an out-of-state office in any trust business not permitted to be conducted at such an office by the laws of the host state applicable to trust institutions chartered by the host state.