(A) There is hereby established a classified service in respect of the offices and employments of the city, which shall include all positions in the city service that are not exempt.
(B) The exempt service shall consist of:
(1) Elected offices;
(2) Members of boards and committees;
(3) The City Manager and such other administrative personnel as the City Manager shall designate;
(4) Voluntary personnel and personnel appointed to service without pay;
(5) Consultants or counsel rendering temporary professional service; and
(6) Positions involving seasonal or part-time employment, or unskilled work, as the City Manager may designate.