Texas Estates Code - EST § 1053.052. Security for Certain Costs

(a) The clerk may require or may obtain from the court an order requiring a person who files an application, complaint, or opposition relating to a guardianship proceeding, other than a guardian, attorney ad litem, or guardian ad litem, to provide security for the probable costs of the proceeding before filing the application, complaint, or opposition.

(b) At any time before the trial of an application, complaint, or opposition described by Subsection (a), an officer of the court or a person interested in the guardianship or in the welfare of the ward may, by written motion, obtain from the court an order requiring the person who filed the application, complaint, or opposition to provide security for the probable costs of the proceeding.  The rules governing civil suits in the county court with respect to providing security for the probable costs of a proceeding control in cases described by Subsection (a) and this subsection.

(c) A guardian, attorney ad litem, or guardian ad litem appointed under this title by a court of this state may not be required to provide security for costs in an action brought by the guardian, attorney ad litem, or guardian ad litem in the guardian's, attorney ad litem's, or guardian ad litem's fiduciary capacity.