(a) The board of each constituent corporation, upon approving such plan of merger or consolidation shall submit such plan to a vote of the members in accordance with the following:

(1) Notice of meeting shall be given to each member whether or not entitled to vote. A copy of the plan of merger or consolidation or an outline of the material features of the plan shall accompany such notice.

(2) The plan of merger or consolidation shall be approved at a meeting of the members by two-thirds vote as provided in paragraph (c) of section 613 (Vote of members).

(3) If any merging or consolidating corporation has no members entitled to vote thereon, a plan of merger or consolidation shall be deemed approved by the members of the corporation when it is adopted by the board of such corporation pursuant to section 902 (Plan of merger or consolidation).

(b) Notwithstanding authorization as provided herein, at any time prior to the filing of the certificate of merger or consolidation, the plan of merger or consolidation may be abandoned pursuant to a provision for such abandonment, if any, contained in the plan of merger or consolidation.