A. 
The Common Council may, from time to time, on its own motion, amend, supplement, repeal or change the regulations and district boundaries established by this chapter.
B. 
Whenever the owners of 50% or more of the frontage in any district or part thereof shall present a petition duly signed and acknowledged to the Common Council requesting an amendment, supplement or change of the regulations prescribed for such district or part thereof, it shall be the duty of the Common Council to refer said petition to the Planning Commission within 45 days after the filing of the same by the petitioners with the Clerk/Chamberlain.
C. 
The Planning Commission may, by resolution, propose an amendment to the Common Council suggesting a change or repeal of regulations. Within 62 days from the time such resolution is filed with the Clerk/Chamberlain, it shall be the duty of the Common Council to vote on such proposed amendment.
D. 
All petitions and applications for amendment(s) in zone district designations, boundaries or regulations relating to the proposed use, construction, structural changes in or alteration of buildings or structures or the use of land on a specific property or properties submitted by the owner(s) or contract purchasers thereof shall be accompanied by drawings, written descriptions and other materials sufficient to provide a thorough understanding of such proposed use and construction.
E. 
Such materials may include but need not be limited to the following as may be appropriate to describe the intent of the proposed use of the property in question:
(1) 
An accurate survey or other dimensioned drawing of boundaries of the property, with at least general indications of adjacent public streets or other rights-of-way, topography and any other features, including adjacent structures and uses, which influence the proposed use and development of the property.
(2) 
Drawing(s) showing the proposed location, scale and exterior character of all existing and proposed structures and site development, including access, parking and other site facilities, sufficient to show basic intent and conformance with requirements of this chapter.
(3) 
Information on the proposed use and occupancy of all land and structures, necessary public and other utility services and how and when these are to be secured and the proposed timetable for construction and development, in phases, if appropriate.
F. 
Where a proposed amendment essentially involves only a change in the use of existing buildings without any significant exterior changes to the buildings or property or any modification of property limits, surveys or drawings need not be submitted. Information in addition to the application form may be in written form sufficient to fully describe all proposed changes.
All proposed amendments, supplements or changes originating by petition or by motion of the Common Council shall be referred to the Planning Commission for a report and recommendations thereon. The Planning Commission shall submit its report within 45 days after receiving such referral. Failure of the Planning Commission to report within the required time shall be deemed to be approval of the proposed amendment.
A. 
Before any amendment, supplement or change in the regulations or district boundaries, there shall be a public notice and hearing thereon as provided by law. Such hearing may be held by the Common Council, by a committee of the Council or by the Planning Commission on request of the Common Council. In addition to the public notice of a hearing, notice shall be given, in writing, either personally or by mail, to all property owners of the land included in such proposed change and the land immediately adjacent extending 100 feet therefrom and the land directly opposite thereto extending 100 feet from the street frontage of such opposite land, as said property owners and addresses appear on the latest completed assessment roll of the City.
B. 
Where more than 12 properties are included in such change and the Common Council, by resolution, determines that notice in writing to each property owner is not feasible, the notice of hearing shall be posted promptly in the public places in the City, including such places in the area affected.
If a protest against a proposed amendment, supplement or change is presented to the Common Council, duly signed and acknowledged by the owners of 20% or more of the area of the land included in such proposed change, or by the owners of 20% or more of the land immediately adjacent extending 100 feet therefrom, or by the owners of 20% or more of the land directly opposite thereto extending 100 feet from the street frontage of such opposite land, such amendment shall not be passed except by the favorable vote of 3/4 of the Common Council.
From time to time, at intervals of not more than three years, the Planning Commission shall reexamine the provisions of this chapter and the location of district boundary lines and shall submit a report to the Common Council recommending such changes or amendments, if any, which may be desirable in the interest of public safety, health, convenience, necessity or the general welfare.