The city council may by resolution determine that the estimated cost of specified proposed services including costs of equipment, improvements, and/or personnel is greater than can be conveniently raised from a single annual assessment and order that such estimated cost shall be raised by an assessment levied and collected in installments over a period not to exceed five fiscal years. The resolution shall generally describe the proposed services, set forth the estimated cost thereof, specify the number of annual installments and the fiscal years during which they are to be collected, and fix or determine the total amount of each annual installment. Such annual assessments may be levied in addition to the regular initial annual assessment for services. (Prior code § 83.10.1000)