If such proposed amendment, supplement, or change has been denied by the Planning and Zoning Commission, or if a protest against such proposed amendment, supplement, or change has been filed with the City Secretary, duly signed and acknowledged by the owners of twenty (20) percent or more either of the area of the lots included in such proposed change, or of all of the lots or land immediately adjoining the same and extending two hundred (200) feet therefrom, such amendment shall not become effective except by a three-fourths (3/4) vote of the members of the City Council of the City of Bedford. Petitions must be filed in the Office of the City Secretary by the Friday prior to the Public Hearing by the City Council.