When it is deemed necessary to make a public improvement to be paid for in whole or in part by special assessment, the Council shall declare the necessity therefor by resolution, and such resolution shall state the method of assessment, the mode of payment, and the number of annual installments, whether the assessments shall be by district or upon abutting, adjacent and contiguous or other special benefited property; and such resolution shall be concurred in by three-fourths of the members of the Council. Such resolution shall be certified to the Director of Finance who shall thereupon proceed to make an assessment report, in accordance with the method of assessment provided for in the resolution, which report shall be filed with the Council, and shall show the lots and lands assessed, the amount of the assessment as to each, and the number of installments not exceeding ten in which such assessment shall be paid.