Mass. Gen. Laws ch. 66, § 17D

Records of the division of fisheries and wildlife in the department of fish and game known as the Massachusetts natural heritage and endangered species program data base shall not be public records; provided, however, that they shall be open for inspection by agents of the commonwealth and the federal government for the purposes of protecting and preserving species and subspecies of nongame wildlife and indigenous plants. Except as otherwise determined by the administrator of the said data base, site-specific rare species information shall be released only upon the receipt of a statement, in writing, by the recipient that he shall keep such information confidential.