The Board of Aldermen may, from time to time, on its own motion or on petition, amend, supplement, change, modify, or repeal by ordinance the boundaries of districts or regulations, or restrictions established. Any proposed amendment, supplement, change, modification, or repeal shall first be submitted to the Planning Commission for its recommendations and report. If the Planning Commission makes no report within sixty (60) days, it shall be considered to have made a report approving the proposed amendment, supplement, modification, or change. Upon the filing of the recommendations and report by the Planning Commission with respect to any proposed amendment, supplement, change, modification, or repeal, the Board of Aldermen shall proceed to hold a public hearing in relation thereto, giving at least fifteen (15) days notice of the time and place of such hearing, which notice shall first be published in a newspaper having a general circulation in the City of Cabool.