(1) Prior to that date the board of directors of the corporation approved either the business combination or the transaction which resulted in the shareholder becoming an interested shareholder;
(2) Upon consummation of the transaction which resulted in the shareholder becoming an interested shareholder, the interested shareholder owned at least 85 percent of the voting stock of the corporation outstanding at the time the transaction commenced, excluding for purposes of determining the number of shares outstanding those shares owned by:
(a) Persons who are directors and also officers; and
(b) Employee share plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or
(3) On or subsequent to the date, the business combination is approved by the board of directors and authorized at an annual or special meeting of shareholders, and not by written consent, by the affirmative vote of at least 66-2/3 percent of the outstanding voting stock which is not owned by the interested shareholder. [1991 c.40 §4; 1991 c.883 §18; 1991 c.927 §5]