Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 156, § 42

Every corporation may, at a meeting duly called for the purpose, by vote of two thirds of each class of stock outstanding and entitled to vote, or by a larger vote if the agreement of association or act of incorporation so requires, change its corporate name, the nature of its business, the classes of its capital stock subsequently to be issued and their preferences and voting power, or make any other lawful amendment or alteration in its agreement of association or articles of organization, or in the corresponding provisions of its act of incorporation, or authorize the sale, mortgage, pledge, lease or exchange of all its property and assets, including its good will, upon such terms and conditions as it deems expedient.