When the purpose for which a valid executive session was held has been served, the minutes, preparatory materials and documents and exhibits of the session shall be disclosed unless the attorney-client privilege or 1 or more of the exemptions under said clause Twenty-sixth of said section 7 of said chapter 4 apply to withhold these records, or any portion thereof, from disclosure.
For purposes of this subsection, if an executive session is held pursuant to clause (2) or (3) of subsections (a) of section 21, then the minutes, preparatory materials and documents and exhibits used at the session may be withheld from disclosure to the public in their entirety, unless and until such time as a litigating, negotiating or bargaining position is no longer jeopardized by such disclosure, at which time they shall be disclosed unless the attorney-client privilege or 1 or more of the exemptions under said clause Twenty-sixth of said section 7 of said chapter 4 apply to withhold these records, or any portion thereof, from disclosure.
Mass. Gen. Laws ch. 30A, § 22