No fault in any notice or other proceedings shall affect the validity of any proceeding under sections 6115.01 to 6115.79, inclusive, of the Revised Code, except to the extent to which it can be shown that such fault resulted in a material denial of justice to the property owner complaining of such fault.

If it is found upon a hearing that by reason of some irregularity or defect in the proceedings the appraisal has not been properly made, the court may nevertheless, on having proof that expense has been incurred which is a proper charge against the property of the complainant, render a finding as to the amount of benefits to said property, and appraise the proper benefits accordingly, where the party is entitled thereto. Thereupon said land shall be assessed as other land equally benefited. If at any time either before or after the issuance of bonds pursuant to such sections, the appraisal of benefits, either as a whole or in part, is declared by any court of competent jurisdiction to be invalid by reason of any defect or irregularity in the proceedings therefor, whether jurisdictional or otherwise, the court of common pleas, on the application of the board of directors of the sanitary district or on the application of any holder of any bonds which have been issued pursuant to such sections, shall promptly and without delay remedy all defects or irregularities as the case requires by directing the board of appraisers of the sanitary district to make, in the manner provided in section 6115.30 of the Revised Code, a new appraisal of the amount of benefits against the whole or any part of the lands in said district as the case requires.