The City Council shall have power from time to time to require other and further duties of all officers whose duties are prescribed herein, and to define, prescribe and change, from time to time, the duties of all officers or employees appointed or elected by its authority to any office or employment under the City, as in the judgment of the City Council may be best for the public interest. The Council shall require good and sufficient bonds to be given by officers or employees handling funds of the City and may require bonds of other officers or employees if considered proper or necessary.