(1) If special assessments are made against property, notice of hearings in the special assessment proceedings shall be given as provided in this section.

    (2) Notice of hearings in special assessment proceedings shall be given to each record owner of, or party in interest in, property to be assessed whose name appears upon the last township tax assessment records by first-class mail addressed to the record owner or party in interest at the address shown on the tax records, at least 10 days before the date of the hearing. The last township tax assessment records means the last assessment roll for ad valorem tax purposes that was reviewed by the township board of review, as supplemented by any subsequent changes in the names or the addresses of the owners or parties listed on that roll. If a record owner's name does not appear on the township tax assessment records, then notice shall be given by first-class mail addressed to the record owner at the address shown by the records of the county register of deeds at least 10 days before the date of the hearing. Notice shall also be published twice before the hearing in a newspaper circulating in the township. The first publication shall be at least 10 days before the date of the hearing. If a published notice includes a list of the property identification numbers of the property to be assessed, that list may provide either the individual property identification number for each parcel of property to be assessed or 1 or more sequential sets of property identification numbers, which include each parcel of property to be assessed. If a published notice includes a list of the property identification numbers of the property to be assessed, that published notice shall also include either a map depicting the area of the proposed special assessment district or a written description of the proposed special assessment district.

    (3) If a person whose name and correct address do not appear upon the last township tax assessment records claims an interest in real property, that person shall immediately file his or her name and address with the township supervisor. This filing is effective only for the purpose of establishing a record of the names and addresses of those persons entitled to notice of hearings in special assessment proceedings. The supervisor shall immediately enter on the tax assessment records any changes in the names and addresses of record owners or parties in interest filed with the supervisor and at all times shall keep the tax assessment records current, complete, and available for public inspection.

    (4) A township officer required to give notice of a hearing in special assessment proceedings may rely upon the last township tax assessment records in giving notice of the hearing by mail. The method of giving notice by mail as provided in this section is declared to be the method that is reasonably certain to inform those to be assessed of the special assessment proceedings.

    (5) Failure to give notice as required in this section shall not invalidate an entire assessment roll, but only the assessment on property affected by the lack of notice. A special assessment shall not be declared invalid as to any property if the owner or the party in interest of that property actually received notice, waived notice, or paid any part of the assessment. If an assessment is declared void by court decree or judgment, a reassessment against the property may be made.

    (6) A special assessment hearing held before June 5, 1974 is validated, insofar as any notice of hearing is concerned, if notice was given by mail to the owners or parties in interest whose names appeared at the time of mailing on the last township tax assessment records. Any such special assessment hearing is validated as to any owner or party in interest who actually received notice of hearing, waived the notice, or paid any part of the special assessment.