Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 110E, § 2

(a) If the charter or bylaws of an issuing public corporation provide, at the time of a control share acquisition, that this chapter applies to control share acquisitions of shares of such corporation, shares of such corporation acquired in such control share acquisition have only such voting rights as are authorized pursuant to the provisions of section five.

(b) A corporation may amend its charter or bylaws to eliminate a provision adopted pursuant to subsection (a), in which event this chapter shall not apply to any control share acquisition respecting the stock of such corporation which occurs after the effective date of such amendment.