County positions shall be either in the classified or the exempt services. The exempt service shall consist of: (1) elected officials; (2) the Chief Administrative Officer; (3) the directors and deputy directors of offices and departments in the executive branch; (4) the executive directors and members of boards and commissions; (5) the immediate staff of the County Executive; (6) the County Auditor; (7) persons assigned to hourly rated positions for temporary or seasonal help, provided that such persons are not compensated for more than 1000 hours work per twelve-month period; (8) experts or specialists performing temporary services; (9) persons employed as attorneys-at-law, except hearing examiners; (10) employees required to be covered by the State merit system; (11) aides for each member of the Council; (12) the Council Administrator, and (13) other positions recommended by the County Executive and approved by the County Council.