The special assessment commission shall cause the assessment list, which list shall not include the amount each lot or tract is benefited by the improvement, to be published once each week for two consecutive weeks in the official newspaper of the county, together with a notice of the time when and the place where the commission will meet to hear objections made to any assessment by any interested party or an interested party’s agent or attorney. In lieu of publication of an assessment list, if it includes more than five thousand lots or tracts, the commission may cause it to be filed and made available for public inspection at all times after the first publication of the notice, during reasonable business hours, at such place as shall be designated in the published notice. The date set for such hearing shall be not less than fifteen days after the first publication of the notice.