Whenever the owners of 50% or more of the street frontage
in any district or any specific part thereof shall present to the
Board of Trustees a petition duly signed and acknowledged requesting
an amendment, supplement, change, modification or repeal of the regulations
prescribed for on the Zoning Map, including said district or said
specified part thereof, it shall be the duty of the Board of Trustees
to hold a public hearing thereon. In case, however, of a protest against
such change signed by the owners of 20% or more of either of the area
of the lots included in such proposed change or of those immediately
adjacent extending 100 feet therefrom or of those directly opposite
thereto extending 100 feet from the street frontage of such opposite
lots, such amendment shall not become effective except by the favorable
vote of all the members of the Board of Trustees. However, no such
regulation, restriction or boundary shall be amended, supplemented
or changed until after a public hearing in relation thereto, at which
parties in interest and citizens shall have an opportunity to be heard.
At least 15 days' notice of the time and place of such hearing shall
be published in a paper of general circulation in the Village.