A provision in a management trust created for a ward or incapacitated person that relieves a trustee from a duty or liability imposed by this chapter or Subtitle B, Title 9, Property Code, is enforceable only if:
(1) the provision is limited to specific facts and circumstances unique to the property of that trust and is not applicable generally to the trust; and
(2) the court creating or modifying the trust makes a specific finding that there is clear and convincing evidence that the inclusion of the provision is in the best interests of the trust beneficiary.