Section 12.9 Notice of Change of Assessments.
   The Assessor shall give notice by first class mail to each owner of property which has been added to the assessment roll or the value of which has been increased or decreased on such roll. The notice shall be addressed to the owner according to the records of the Assessor's office and mailed not less than ten days before the date of the convening of the Board of Review. Neither the failure of the Assessor to give notice nor the failure of a person to receive notice shall invalidate any assessment roll or any assessment thereon.