(a) Except as provided by Subsection (b), (c), or (f), in any action under this code, the department shall be represented in court by the county attorney of the county where the action is brought, unless the district attorney or criminal district attorney of the county elects to provide representation.
(b) If the county attorney, district attorney, or criminal district attorney is unable to represent the department in an action under this code because of a conflict of interest or because special circumstances exist, the attorney general shall represent the department in the action.

(c) If the attorney general is unable to represent the department in an action under this code, the attorney general shall deputize an attorney who has contracted with the department under Subsection (d) or an attorney employed by the department under Subsection (e) to represent the department in the action.
(d) Subject to the approval of the attorney general, the department may contract with a private attorney to represent the department in an action under this code.
(e) The department may employ attorneys to represent the department in an action under this code.
(f) In a county with a population of 2.8 million or more, in an action under this code, the department shall be represented in court by the attorney who represents the state in civil cases in the district or county court of the county where the action is brought. If such attorney is unable to represent the department in an action under this code because of a conflict of interest or because special circumstances exist, the attorney general shall represent the department in the action.