In order to preserve and promote the health, safety, morals, convenience and welfare of the townspeople; to lessen the danger from fire; to improve and beautify the Town and to stabilize the value of the real estate, the following regulations for the use of premises and the construction, location and use of buildings and structures are hereby established under the General Laws relating thereto.
A.
No parcel of land in any district shall be used for any purpose other than those authorized for the district in which it is located. The uses shall be subject to the other restrictions required by this by-law except for municipal purposes when and as authorized by a vote of the Town. The use of land in any district by the Rockport Housing Authority for housing of elderly persons of low income and for municipal uses by the Town of Rockport shall be exempt from all of the provisions of this Zoning By-law when and as authorized by a two-thirds vote of the Town. The use, construction, alterations, height and area of buildings and the use of premises in the aforementioned districts shall be regulated and restricted as hereinafter provided. No lot, and no building and structure, shall be changed in size or use so as to violate the provisions of this by-law.
B.
All Town-owned property used for municipal purposes is exempt from the provisions of this by-law.