Okla. Stat. tit. 19, § 19-215.34: Assistant district attorneys

A. All assistant district attorneys who are paid in excess of

fifty percent (50%) of the salary of the district attorney shall not

engage in the private practice of law, but may complete pending

cases of a civil nature, not in conflict with the interests of any

county of the district in which appointed. No assistant district

attorney permitted to practice law shall accept employment in a case

investigated by the office of the district attorney.

B. Each county in a district shall have at least one assistant

district attorney who shall reside in the county or an adjoining

county.

C. Each assistant district attorney shall: be at least twenty-

one (21) years of age; be a resident of the district, if required by

the district attorney; and have a license to practice law in the

courts of record of this state at the time of appointment. All

assistant district attorneys shall serve at the pleasure of the

district attorney.