Section 12-6a12 - Same; supplemental assessments; reassessments and new assessments, when(a) Upon notice and hearing as provided for in the original assessment, the governing body may make supplemental assessments to correct omissions, errors or mistakes in the assessment relating to the total cost of the improvement.(b) When an assessment is, for any reason whatever, set aside by a court of competent jurisdiction as to any parcel or parcels of land, or in event the governing body finds that the assessment or any part thereof is excessive or determines on advice of counsel in writing, that it is or may be invalid for any reason, the governing body may, upon notice and hearing as provided for the original assessment, make a reassessment or a new assessment as to such parcel or parcels.L. 1957, ch. 99, § 12; June 29.