Except as authorized by the members, the board of directors of a cooperative may not dispose of all or substantially all of the cooperative's fixed assets. At any meeting the members may authorize the disposition of all or substantially all of a cooperative's fixed assets if:
(1) Notice that such disposition will be considered at such meeting has been given to all persons entitled to vote thereon; and
(2) Such disposition has been approved by three-fourths of those voting at the meeting.