(a) No contract or other transaction between a corporation and one or more of its directors, or between a corporation and any other corporation, firm, association or other entity in which one or more of its directors are directors or officers, or have a substantial financial interest, shall be either void or voidable for this reason alone or by reason alone that such director or directors are present at the meeting of the board, or of a committee thereof, which approves such contract or transaction, or that his or their votes are counted for such purpose:

1. (1) If the material facts as to such director's interest in such contract or transaction and as to any such common directorship, officership or financial interest are disclosed in good faith or known to the board or committee, and the board or committee approves such contract or transaction by a vote sufficient for such purpose without counting the vote of such interested director or, if the votes of the disinterested directors are insufficient to constitute an act of the board as defined in section 708 (Action by the board), by unanimous vote of the disinterested directors; or
2. (2) If the material facts as to such director's interest in such contract or transaction and as to any such common directorship, officership or financial interest are disclosed in good faith or known to the shareholders entitled to vote thereon, and such contract or transaction is approved by vote of such shareholders.