Texas Civil Practice and Remedies Code - CIV PRAC & REM § 101.103. Legal Representation

(a) The attorney general shall defend each action brought under this chapter against a governmental unit that has authority and jurisdiction coextensive with the geographical limits of this state.  The attorney general may be fully assisted by counsel provided by an insurance carrier.

(b) A governmental unit having an area of jurisdiction smaller than the entire state shall employ its own counsel according to the organic act under which the unit operates, unless the governmental unit has relinquished to an insurance carrier the right to defend against the claim.