Generally. The regulations, restrictions, and boundaries contained in this ordinance may from time to time be amended supplemented, changed, modified, or repealed, by the board of aldermen, either on its own motion or an application or a petition thereto, in writing, filed with the board of aldermen of the City of Garden City, Missouri. Said application or petition shall be accompanied by a filing fee of $100; payable to the city clerk of said City. Costs that are necessarily incident to the provisions of the application in excess of $100 shall be billed to the applicant or petitioner. Before taking any action upon any proposed amendment, supplementation, change, modification, or appeal, same shall be referred to the planning and zoning board by the board of aldermen for report and recommendation. The planning and zoning board shall then hold a public hearing on said application or petition after public notice thereof, duly published according to law as provided by RSMo. Chapter 89. After public hearing is held, the planning and zoning board shall thereupon make its final report to the board of aldermen of the City, either favorably or unfavorably recommending said application or petition, which recommendation shall be filed with the city clerk. Thereupon, the board of aldermen shall hold a public hearing thereon after public notice thereof, duly according to laws provided in RSMo. Chapter 89; said board of aldermen may then approve any such application or petition by ordinance amending, supplementing, changing, modifying, or appealing, as may be required in the premises. In case, however, of a protest against such change, duly signed and acknowledged by the owners of ten percent or more, either of the areas of land (exclusive of streets and alleys) included in such proposed change or within an area determined by lines drawn parallel to and 185 feet distant front the boundaries of the district proposed to be changed, such amendment shall not become effective except by favorable vote of three-fourths of all members of the board of aldermen of the City of Garden City, Missouri.