(a) The criminal district attorney of Jackson County shall attend each term and session of the district courts in Jackson County and each term and session of the inferior courts of the county held for the transaction of criminal business and shall exclusively represent the state in all criminal matters before those courts.
(b) The criminal district attorney shall perform the duties conferred by law on the county and district attorneys in the various counties and districts.

(c) The criminal district attorney shall collect the fees, commissions, and perquisites that are provided by law for similar services rendered by a district or county attorney.
(d) The Commissioners Court of Jackson County may supplement the salary paid by the state to the criminal district attorney.