The Town Board may from time to time, on its own motion, or on petition or upon recommendation of any board of the town, amend, supplement or repeal any or all of the regulations and provisions of this chapter. Every such proposed amendment or change may be referred to the Zoning Board of Appeals and/or the Planning Board for written report before the public hearing hereinafter provided for.

The Town Board, by resolution adopted at a stated meeting, shall fix the time and place of a public hearing on the proposed amendments and cause notice thereof to be given as follows:

Whenever the owners of 50% or more of the street frontage in any district, or specified part thereof, shall present to the Town Board a petition duly signed and acknowledged, in form approved for deeds, requesting an amendment, supplement, change, modification or repeal of the regulations prescribed, or a change in the boundaries shown on the Zoning Map, including said district or specified part thereof, it shall be the duty of the Town Board to hold a public hearing in the manner prescribed above.

In the case, however, of a protest against any change, signed by the owners of 20% or more either of the area of the land including 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 four members of the Town Board.