SECTION XI-1. CIVIL SERVICE COMMISSION.
   There shall be a Civil Service Commission composed of three (3) registered electors of the City not holding any other municipal office of employment, each of whom shall be appointed by the City Manager for a term of six (6) years. At the time of any appointment, not more than two (2) members shall be adherents of the same political party. Any vacancy occurring during the term of any member of said Commission shall be filled for the unexpired term in the manner the original appointment was made.
   The Civil Service Commission shall adopt rules and shall provide by rule for the ascertainment of merit and fitness as the basis for appointment and promotion in the service of the City and shall establish such other rules for control of promotion in the services as it determines to be for the best interest of the City.
   Members of the Civil Service Commission shall serve without compensation unless otherwise provided by ordinance. A sufficient sum shall be appropriated by the Council to carry out the Civil Service provisions of this Charter.