A. 
The Common Council may from time to time on its own motion, or on petition or on recommendation of the Planning Board, amend, supplement or repeal the regulations and provisions of this chapter after public notice and hearing. Every such proposed amendment or change, whether initiated by the Common Council or by petition, shall be referred to the Planning Board for report thereon before the public hearing hereinafter provided for. If the Planning Board recommends against the enactment of any proposed amendment, it shall become effective only by a three-fourths vote of the Common Council.
B. 
The Common Council by resolution adopted at a stated meeting, shall fix the time and place of a public hearing on the proposed amendment and cause notice to be given as follows:
(1) 
By publishing a notice once a week for two consecutive weeks, in at least one newspaper of general circulation in the City, and/or, in the sole discretion of the Common Council, by mailing notice thereof setting forth the time, place and purpose of the hearing, nature of the amendment, and description of the property involved, to be mailed by ordinary or certified mail, or to be personally delivered to all owners or occupants of affected property at least eight days before the hearing. For the purpose of this chapter, "affected property" shall be all that property located within an area bounded by lines drawn parallel to and at a distance of 200 feet from the property lines of the property to be rezoned. In its discretion, the Common Council may include any other property it deems affected by any proposed change or amendment. As substantial or total repeal and reenactment of the Zoning Ordinance or regulations need not be considered an amendment or change for the purpose of this subsection regarding actual notice to owners or occupants. (The most recent assessment roll of the City of Lockport shall be used to determine the identity of the owners of such property.) Notice shall also be mailed to every association of residents in the City which shall have registered its name and address for this purpose with the City Clerk.
(2) 
A written notice of any proposed change or amendment affecting property within the protectively zoned area of a housing project authorized under the Public Housing Law, as such area is shown on an approved Zoning Map filed with the Building Inspector, shall be given to the Housing Authority erecting or owning the project and to the government providing financial aid for assistance thereto at least 10 days prior to the date of such hearing.
(3) 
A written notice of any proposed change or amendment affecting property within 500 feet of the boundaries of any state park or parkway, shall be given to the regional State Park Commission having jurisdiction over such state park or parkway, at least 10 days prior to the date of such hearing.
(4) 
A written notice of any proposed change or amendment affecting property within 500 feet of the boundaries of any City, Village, Town or County, shall be given to the Clerk of such municipality and to the Clerk of the Board of Supervisors at least 10 days prior to the date of such hearing.
(5) 
In case, however, of a protest against such change signed by the owners of 20% or more of the area of land included in such proposed change or of that immediately adjacent extending 100 feet therefrom or of that directly opposite thereto, extending 100 feet from the street frontage of such opposite land, such amendment shall not become effective except by the favorable vote of 3/4 of the Common Council.
In the interpretation and the application of the provisions of this chapter, they shall be held to be the minimum requirements for the promotion of the public health, safety, convenience, comfort and general welfare. It is not intended by this chapter to interfere with or abrogate or annul any easement, covenant or other agreement between parties or other rules, regulations or ordinances, provided that where this chapter imposes greater restrictions upon the use of buildings or premises, or upon the height or bulk of buildings or requires larger open spaces than are imposed or required by other ordinances, rules, regulations or by easements, covenants or agreements, the provisions of this chapter shall govern.