In case of a protest against such change signed
by the owners of 20% or more either of the land included in such proposed
change or of the land immediately adjacent thereto and extending 100
feet therefrom or of the land directly opposite thereto and extending
100 feet from the street frontage of such opposite land, such amendment
shall not become effective except by the favorable vote of at least
3/4 of the members of the Town Board.
From time to time, at intervals of not more
than three years, the Planning Board shall re-examine the provisions
of this chapter and the location of district boundary lines and shall
submit a report to the Town Board recommending such changes or amendments,
if any, which may be desirable in the interest of public safety, health,
convenience, necessity or welfare.