After the public hearing, the Council may by resolution determine to make the acquisition, construction or replacement of any improvement or to provide such public service and to defray the whole or any part of the cost thereof by assessments upon property especially benefitted. The resolution shall include the approval of the plans and specifications on file with the Clerk, either as filed or as modified, shall establish the district which is to be especially benefitted and upon which special assessments shall be levied, shall provide for the manner in which the assessment is to be levied by the assessor and shall direct the assessor to spread the roll. The Council may also provide in such resolution that a portion of the cost of such construction, improvement or provision of service be paid by the village at large. Such resolution shall also provide for the number of installments in which each assessment may be paid, provided that the total number of installments shall not exceed 30.
(O.C. § 1.38)