No improvement assessment shall be rendered invalid by reason of a failure of the engineer’s report to contain all of the information required by MMC 3.12.010, or by reason of a failure to have all of the information required to be in the improvement resolution, the assessment ordinance, the lien docket or notices require to be published, posted and mailed, nor by the failure to list the name of, or mail notice to, the owner of any property as required by this chapter, or by reason of any other error, mistake, delay, omission, irregularity or other act, jurisdictional or otherwise, in any of the proceedings or steps specified in this chapter, unless it appears that the assessment is unfair or unjust in its effect upon the person complaining. The council shall have the power and authority to remedy and correct all such matters by suitable action and proceedings. (Ord. 3570 §16, 1971).