Mass. Gen. Laws ch. 90B § 32
Sections 21 to 34, inclusive, and the rules and regulations promulgated thereunder shall be enforced by law enforcement officers; provided, however, that any investigation, arrest or decision to seek application for complaint relative to a violation of subsections (c) to (e), inclusive, of section 26B shall be executed by a law enforcement officer who has successfully completed minimum training requirements for the enforcement of such sections as determined by the secretary of public safety and security. Such officers may, in the performance of their duty, enter upon and pass through or over private lands or property.
Every officer authorized to enforce the provisions of this chapter, or any rule, regulation, ordinance or by-law made under authority hereof, shall report to the director, on forms provided by him and in such manner as he may prescribe, every violation of such chapter, rule, regulation, ordinance or by-law.
Mass. Gen. Laws ch. 90B, § 32