Tex. Family Code § 107.031

(a) In a suit filed by a governmental entity requesting termination of the parent-child relationship or appointment of the entity as conservator of the child, the court may appoint a charitable organization composed of volunteer advocates whose charter mandates the provision of services to allegedly abused and neglected children or an individual who has received the court's approved training regarding abused and neglected children and who has been certified by the court to appear at court hearings as a guardian ad litem for the child or as a volunteer advocate for the child.

(b) In a suit other than a suit filed by a governmental entity requesting termination of the parent-child relationship or appointment of the entity as conservator of the child, the court may appoint a charitable organization composed of volunteer advocates whose training provides for the provision of services in private custody disputes or a person who has received the court's approved training regarding the subject matter of the suit and who has been certified by the court to appear at court hearings as a guardian ad litem for the child or as a volunteer advocate for the child. A person appointed under this subsection is not entitled to fees under Section 107.023.

(c) A court-certified volunteer advocate appointed under this section may be assigned to act as a surrogate parent for the child, as provided by 20 U.S.C. Section 1415(b), if:

(1) the child is in the conservatorship of the Department of Family and Protective Services;

(2) the volunteer advocate is serving as guardian ad litem for the child;

(3) a foster parent of the child is not acting as the child's parent under Section 29.015, Education Code; and

(4) the volunteer advocate completes a training program for surrogate parents that complies with minimum standards established by rule by the Texas Education Agency within the time specified by Section 29.015(b), Education Code.