Texas Government Code - GOV'T § 41.309. Election of Counsellor

(1) be certified in criminal law by the Texas Board of Legal Specialization;

(2) have at least five years of experience as a lawyer assisting prosecuting attorneys in prosecuting offenses or delinquent conduct committed on state property used for the custody of persons charged with or convicted of offenses or used for the custody of children charged with or adjudicated as having engaged in delinquent conduct or conduct indicating a need for supervision; or

(3) have served for at least five years as a prosecuting attorney or as a judge of a district court, a court of appeals, or the court of criminal appeals.