Except as herein after provided, this By-law shall not apply to
structures or uses lawfully in existence or lawfully begun, or to a building permit or special permit issued before
the first publication of notice of the public hearing on this By-Law or any amendments thereto, but shall apply to
any change or substantial extension of such use, to a building permit or special permit issued after the first notice
or said public hearing, to any reconstruction, extension or structural change of such structure and to any alteration
of a structure begun after the first notice of said public hearing to provide for its use in a substantially different
purpose or for the same purpose in a substantially different manner or to a substantially greater extent except
where alteration, reconstruction, extension or a structural change to a single or two family residential structure
does not increase the nonconforming nature of said structure. 1.4.2 Commencement of Construction or Operation. Construction or operations under a building permit
or special permit shall conform to any subsequent amendments to this By-Law, unless the use or construction is
commenced within a period of not more than six months after the issuance of the permit and in any case involving
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construction, unless such construction is continued through to completion as continuously and expeditiously as is
reasonable. 1.5 AMENDMENTS. This By-law, including the Zoning Map which is part hereof, may be amended at a
regular or special Town Meeting in accordance with Chapter 40A of the General Laws of Massachusetts. Petitions
for zoning amendments shall be made in accordance with G.L. c. 40A, s. 5, and shall be submitted to the Board
of Selectmen with a copy to the Planning & Zoning Board and shall be accompanied by the following:
1.5.1 Text. For petitions concerning the text of this By-law, five (5) copies of the existing and proposed text
shall be submitted. 1.5.2 Zoning Map.