(a)   All departments of the city in existence on the effective date of this charter shall remain as then organized unless and until nine (9) aldermen shall vote to establish, eliminate, combine or otherwise reorganize departmental structure by ordinance to meet the future needs of the city. Such ordinances(s) shall describe the functions of the departments so established.
   (b)   In exercising the powers set forth herein, the aldermen shall detail in any ordinance passed, the scope and duties of any department and shall have the power to consolidate similar functions performed by several departments in one or more departments.
   (c)   The board of aldermen may by majority vote transfer support functions from one department to another in the interest of economy or efficiency or in keeping with good business practice.