In the event of written protest against the proposed amendment signed and acknowledged by the owners of 20% of the frontage proposed to be altered, or by the owners of 20% of the frontage immediately adjoining or across the alley or rear line therefrom, or by the owners of 20% of such regulations or zoning district, filed with the Clerk, such amendment shall not be passed, except by the favorable vote of three-fourths of all of the members of the Council.
(Ord. passed 8-4-86)