Whenever any special assessment shall, in the opinion of theCouncil, be invalid by reason of irregularity or informality in the proceedings, or if any court of competent jurisdiction shall adjudge such assessment be illegal, the Council shall, whether the improvement has been made or not, or whether any part of the assessments have been paid or not, have power to cause a new assessment to be made for the same purpose for which the former assessment was made. All proceedings on such reassessment and for the collection thereof shall be conducted in the same manner as provided for the original assessment, except that it shall not again be necessary to prepare plans and estimates of cost, nor to hold any hearing on the necessity of the improvement, unless and to the extent that the cause of the irregularity arose in such proceedings. Whenever any sum or part thereof, levied upon any property for the assessment so set aside, has been paid and not refunded, the payment so made shall be applied upon the reassessment, or, if the payments exceed the amount of the reassessment, refunds shall be made in the manner prescribed in Section 11.4 of this Charter.
No judgment or decree, nor any act of the Council, vacating a special assessment shall destroy or impair the lien of the City upon the premises assessed for such amount of the assessment as may be equitably charged against the same had such charge been lawfully assessed thereupon in accordance with the procedure established or authorized herein.