Tex. Civ. Prac. & Rem. Code § 172.214
A conciliator, party, or representative of a conciliator or party, while present in this state to arrange for or participate in conciliation under this chapter, is not subject to service of process in a civil matter related to the conciliation.
Added by Acts 1997, 75th Leg., ch. 165, Sec. 5.02, eff. Sept. 1, 1997.