Personal data the disclosure of which may constitute an invasion of personal privacy is not a public record. In general, it is an invasion of personal privacy under M.G.L. c. 214, § 1B, as appearing in St. 1973, c. 1114, § 62, to disclose personal data where such disclosure will result in an unreasonable, substantial or serious interference with the privacy of a data subject unless the data subject or his authorized representative consents to such disclosure.
950 CMR, § 33.16