Texas Government Code - GOV'T § 41.254. Limitations on Law Practice

(a) An assistant prosecutor who receives longevity pay under this subchapter may not engage in the private practice of law if, from all funds received, the assistant prosecutor receives a salary that is equal to or more than 80 percent of the salary paid by the state to a district judge.

(b) An assistant prosecutor who becomes subject to this section may complete all civil cases that are not in conflict with the interest of any of the counties of the district in which the assistant prosecutor serves and that are pending in court before the assistant prosecutor exceeds the salary cap.