The Board of Civil Service Commissioners shall establish classes for all positions of employment. The positions classified by the board shall constitute the classified civil service of the City, and no appointment to any of these positions shall be made except in accordance with the rules adopted by the board under the authority of this Article (the civil service rules).
Each class shall be given an appropriate title and shall include all positions sufficiently similar in respect to duties and responsibilities and that have the same requirements as to education, experience, knowledge and ability; the same tests of fitness; and to which the same schedule of compensation may apply with fairness.