Appointments and promotions in the classified civil service of the city shall be made according to merit and fitness, to be ascertained by competitive examinations.
No officer or employee in the classified service shall be demoted or removed except for cause and after hearing, and the Council shall provide by ordinance for the enforcement of this provision and also for appeals to the Civil Service Commission from suspensions, demotions and removals by the Mayor. Except as herein otherwise provided, ordinances shall be passed to fix the powers and duties of the Civil Service Commission and to prescribe rules and regulations governing the classified civil service.