Rule 5.406 - Testamentary Guardian of Individual With Developmental Disabilities(A) Appointment. If the court has not appointed a standby guardian, a testamentary guardian may qualify after the death of a parent who had been the guardian of an individual with developmental disabilities by filing an acceptance of appointment with the court that appointed the deceased parent as guardian. If the nominated person is to act as guardian of the estate of the ward, the guardian should also file a bond in the amount last required of the deceased guardian. Unless the court finds the person unsuitable or incompetent for the appointment, the court shall issue to the testamentary guardian letters of authority equivalent to those that had been issued to the deceased guardian.(B) Notice, Revocation. The testamentary guardian must notify the court in which the testamentary instrument has been or will be filed of the appointment as guardian. The probating court shall notify the court having jurisdiction over the guardianship if the will is denied probate, and the court having the guardianship jurisdiction shall immediately revoke the letters of authority.