Mississippi Code Title 81. Banks and Financial Institutions § 81-27-2.102

(a) An out-of-state trust institution that does not operate a trust office in this state and that meets the requirements of this subarticle may establish and maintain a new trust office in this state.

(b) Until January 1, 1999, an out-of-state trust institution may not establish a new trust office in this state unless a similar institution chartered under the laws of this state to act as a fiduciary, is permitted to establish a new trust office that may engage in activities substantially similar to those permitted to trust offices of out-of-state trust institutions under Section 81-27-2.101, in the state where such out-of-state trust institution has its principal office.