If otherwise lawful, any two or more associations may merge or consolidate under this chapter or under the law of the state where the surviving or new association will exist. Before a cooperative may merge or consolidate with any other association, a written plan of merger or consolidation shall be prepared by the board or by a committee selected by the board or the members for that purpose. Such plan shall set forth all the terms of the merger or consolidation and the proposed effect thereof on all members and stockholders of the cooperative. In case of consolidation, the plan shall also contain the articles of the new association. The members shall approve the plan in the manner provided in section 10-15-37 for amendments to the articles.