There is created the Office of Appellate Defense which shall be administered by a Chief Attorney. The staff of the Chief Attorney shall consist of additional attorneys and administrative, investigative, secretarial, and clerical employees necessary to discharge the duties of the office. No person shall be hired to serve as an Assistant or Staff Attorney who is not licensed to practice law in this State. Attorneys employed by the Chief Attorney shall devote full time to their duties and may not engage in the private practice of law.