"District attorney" means any district attorney of this state, the Attorney General, the director of the Prosecuting Attorneys' Council of the State of Georgia, or any solicitor-general or solicitor of a state, municipal, or recorder's court or any assistants of such [...]

(6) "District attorney" means any district attorney holding office on July 1, 1998, and any district attorney taking office on or after July 1, 1998, except that the term district attorney shall not include any district attorney: