Mass. Gen. Laws ch. 130, § 8A

In a city or town bordering on coastal waters, a police officer employed on a full time, provisional or reserve basis shall, for the enforcement of sections thirty-one, thirty-seven, thirty-eight, thirty-eight A, thirty-nine, forty-one, forty-one A, forty-three and forty-four, have the authority granted to an environmental police officer, subject to such rules and regulations as the director with the approval of the commissioner are hereby authorized to adopt.