Ark. Code Ann. § 4-31-303

Any foreign bank or trust company with fiduciary powers may be appointed and may serve in the State of Arkansas as trustee of a personal or corporate trust, executor, administrator, guardian of the estate, or in any other fiduciary capacity, whether the appointment is by will, deed, agreement, declaration, indenture, court order, or decree, or otherwise, when and to the extent that the District of Columbia, territory, or other state in which the foreign bank or trust company is organized and has its principal office grants such fiduciary authority to a bank or trust company organized under the laws of and having its principal office in the State of Arkansas, or to a national bank having its principal office in the State of Arkansas.