7-3-4261. Conduct of civil service commission business. Said commissioners shall make an annual report to the council, and it may require a special report from said commissioners at any time. Said council may prescribe such rules for the proper conduct of the business of the commission as shall be found expedient and advisable, including restrictions on appointment, promotions, removals for cause, roster of employees, certificates of records to the auditors, and payment to persons improperly employed.