The City Council may from time to time, on its own motion or on petition, amend, supplement, change, modify or repeal by chapter the boundaries of districts, or regulations or restrictions herein established. Any proposed amendment, supplement, change, modification or repeal shall first be submitted to the Planning and Zoning Commission for its report and recommendation. The Commission shall hold a public hearing as provided in Section 165.58 on the proposed amendment and make a report and recommendation to the Council within forty-five (45) days of the public hearing. Failure to act within 45 days shall constitute a recommendation of denial. Within thirty (30) days of receipt of the Commission’s recommendation, the Council shall hold a public hearing on the proposed amendment. The Council shall act on the proposed amendment within 45 days of the public hearing. The City may take an additional 45 days to implement required multiple readings of the chapter and required publication. Failure to enact an amendment within ninety (90) days shall constitute denial of the amendment. Reconsideration of the amendment, after denial, is processed as if it were newly initiated; following the same procedures before the Commission and Council.