The Council may at any time prior to the 15th day of September in any year declare by resolution, adopted by a vote of 2/3 of all the members thereof, that the amount of taxes which may be raised within the limitations of this Charter will be insufficient to provide an adequate amount for the necessary requirement of the City for current operating expenses, and other expenses payable from the general fund of the City, and such permanent improvements and equipment as shall have an estimated useful life of five years or more, and that it is necessary to levy taxes in excess of such limitation, in addition to the levies authorized and limited by this Charter, for the municipal purpose or purposes specified in such resolution.  Such resolution shall specify the additional rate which it is necessary to levy, the purpose or purposes thereof, the number of years during which such rate shall be in effect and the date of the proposed election thereon.  Such resolution shall be effective upon its adoption and shall be certified within five days thereafter to the election authorities, who shall place such question upon the ballot at the next succeeding November election.  If a majority of those voting thereon vote for the approval of such additional levy, the Council shall, for a period not in excess of that prescribed in such resolution, make such levy, or such part thereof as it finds necessary, pursuant to such approval and certify the same to the County Auditor, to be placed on the tax list and collected as other taxes.