A. Adoption of any amendment to this chapter shall be by ordinance after public hearings thereon. If protests to such amendment are filed at least three (3) days before the date of public hearings by:
1. The owners of twenty percent (20%) or more of the area included in the proposed change; or
2. The owners of fifty percent (50%) or more of the properties within a three hundred foot (300') radius of the proposed change,
the proposed amendment or change shall not become effective except by a favorable vote by three-fifths (3/5) of the city council. (Prior code § 16-51)