Miss. Code Ann. § 91-9-719

If a qualified trustee of a qualified disposition trust ceases to meet the requirements of Section 91-9-703(k)(1), and there remains no trustee that meets the requirements, the qualified trustee shall be deemed to have resigned as of the time of that cessation, and thereupon the successor qualified trustee provided for in the qualified disposition trust shall become a qualified trustee of the qualified disposition trust, or in the absence of any successor qualified trustee provided for in the qualified disposition trust, then a court of this state shall, upon application of any interested party, appoint a successor qualified trustee.