Indiana Code Title 23. Business and Other Associations § 23-1-43-22

(1) the original articles of incorporation of which contain a provision expressly electing not to be governed by this chapter;

(2) that, before the earlier of:

adopts an amendment to the resident domestic corporation's bylaws expressly electing not to be governed by this chapter;  however, an election under this subdivision may be rescinded by subsequent amendment of the bylaws;  or

(3) that adopts an amendment to the resident domestic corporation's articles of incorporation, approved by the affirmative vote of the holders, other than interested shareholders and their affiliates and associates, of a majority of the outstanding voting shares of the resident domestic corporation, excluding the voting shares of interested shareholders and their affiliates and associates, expressly electing not to be governed by this chapter, if the amendment to the articles of incorporation is not to be effective until eighteen (18) months after the vote of the resident domestic corporation's shareholders and does not apply to any business combination of the resident domestic corporation with an interested shareholder whose share acquisition date is on or before the effective date of the amendment.