The Civil Service Commission shall provide by rule for the ascertainment of merit and fitness as the basis for appointment and promotion in the service of the City, as required by the Constitution and/or laws of the State of Ohio, and for appeals from the action of the Mayor or any director in any case of transfer, reduction or removal. The action of the Commission on any such appeal shall be final except as otherwise provided by the laws of Ohio. Except as herein provided, the Civil Service Commission shall determine the practicability of competitive examinations for any non-elective officer or job classification in the service of the City.