The zoning regulations, restrictions, and boundaries may from time to time be amended, supplemented, changed, modified or repealed. Such amendments, supplements, changes, modifications, or repeals shall be deemed to amend, supplement, change, modify, or repeal the comprehensive plan of the city and shall become a part of such comprehensive plan.

An amendment to this ordinance may be initiated by:

Procedures for amendments to zoning district boundaries are as follows:

Prior to making its report to the city council, the planning and zoning commission shall hold at least one public hearing thereon. Written notice of all public hearings on proposed changes in district boundaries shall be sent not less than 15 days before such hearing is held to all owners of property who have rendered their property for city taxes, which is located within the area proposed to be changed, within 200 feet of such property or within 200 feet of any other adjacent property under the same ownership as the tract to be rezoned. Such notice may be served by using the last known address as listed on the city tax roll and depositing the notice, postage paid, in the United States mail. No notice of hearings before the planning and zoning commission on proposed changes in zoning regulations need to be given except as may be required by “open meeting” laws.

The planning and zoning commission, after the public hearing is closed, shall vote on its recommendations on the proposed change to be sent in a report to the city council. Such report may recommend for or against such proposed change and may, but need not, include reasons for such decision. The commission may defer its report for not more than 60 days until it has had opportunity to consider other proposed changes which may have a direct bearing thereon. If the commission fails to finally report after 60 days, it would be deemed to have recommended negatively to the proposal.

Every proposal receiving a final report by the commission shall be forwarded to the council for setting and holding of public hearing thereon. No change, however, shall become effective until after the adoption of an ordinance for same and its publication as required by law.

Any proposal or application may be withdrawn by the proponent after the commission makes its final report, and such proposal or application shall not be subject to the provision hereof that a period of time must pass before a new application is considered. If such proposal is withdrawn, the council will not consider it. Any proposal or application withdrawn may be resubmitted and shall be subject to all fees and notice requirements as an original application.

The city council may from time to time amend, supplement, or change by ordinance the boundaries of the districts or the regulations herein established. A public hearing on such amendment, supplement, or change shall be held by the council. Notice of council hearing shall be given by publication one time in the official newspaper of the city, stating the time and place of such hearing, which time shall not be earlier than 15 days from the date of publication. No such amendment, supplement, or change shall be considered unless and until the commission makes its final report thereon. Publication of such change shall be accomplished by publishing the descriptive caption and penalty clause of the ordinance amending the comprehensive plan to incorporate the change.

No application for rezoning shall be considered within six months of denial of a request by the city council for the same classification on the same property.

If such proposed amendment, supplement, or change fails to receive a favorable report and recommendation by the city plan [planning and zoning commission] or if there is a protest filed with the city secretary against such proposed amendment, supplement or change, duly signed by the owners of 20 percent or more, either of the area of the lots included in such change, or of those immediately in the rear thereof, extending 200 feet therefrom, or of those directly opposite thereto, extending 200 feet from the street frontage of such opposite lots, such proposed amendment, supplement, or change shall not become effective except by a three-fourths vote of all the members of the city council.

The proponent of any zone change shall satisfy the city council that either the general welfare of all the city affected by the area to be changed will be enhanced, or that the property is unusable for the purposes allowed under existing zoning. If such is proved to the council’s satisfaction, it may grant the requested zone change; or it may change the zone’s designation of a portion of such property; or it may initiate a request to consider changing all or a portion of such property to a district other than that requested and of a different character.