The mayor and city council may amend, supplement, change, modify or repeal the regulations, restrictions and boundaries as provided for in this title. (1-2-1968)

A public hearing shall be held by the planning commission before adoption of any amendment, supplement or change by the city council. Public notice of such public hearing shall be placed in a newspaper of general circulation within the community not more than thirty (30) days nor less than fifteen (15) days before the hearing.

In case of a written protest against any proposed amendment of the regulations or districts, signed and acknowledged by the owners of twenty percent (20%) of the frontage proposed to be altered, or by the owners of twenty percent (20%) of the frontage immediately joining or across an alley therefrom, or by the owners of twenty percent (20%) of the frontage directly opposite the frontage proposed to be altered, such protest being filed with the city clerk, the amendment shall not be passed except by a favorable vote of two-thirds (2/3) of all the members of the city council.

In order to partially defray the expenses of a zoning change public hearing, each person petitioning for a zoning change shall deposit with the city treasurer the sum of thirty five dollars ($35.00). No part of such amount shall be refunded for failure of said amendment to be enacted into law. (1-2-1968)

No amendment shall become effective unless it is first submitted to and approved by the planning commission, or if disapproved, shall receive a two-thirds (2/3) majority vote of the entire city council. (1-2-1968)

The city council shall cause to be published no later than March 31 of each year a map clearly showing the existing zoning divisions and classifications. If in any calendar year there are no changes in zoning divisions, no map shall be published for such calendar year. (1-2-1968)