(a) Composition; Term of Office – There shall be a board of health consisting of three members elected for three-year terms, so arranged that one term shall expire each year.

(b) Powers and Duties – The board of health shall be responsible for the formulation and enforcement of rules and regulations affecting the environment and the public health. It shall have all of the powers and duties given to boards of health under the constitution and general laws of the Commonwealth, and such additional powers and duties as may be authorized by the charter, by bylaw or by other town meeting vote.