The proposition for the conversion of such corporation into a cooperative and the proposed articles of conversion approved by the board of trustees or board of directors, as the case may be, of such corporation shall then be submitted to a vote of the members or stockholders, as the case may be, of such corporation at any duly held annual or special meeting thereof, the notice of which shall set forth full particulars concerning the proposed conversion. The proposition for the conversion of such corporation into a cooperative and the proposed articles of conversion, with such amendments thereto as the members or stockholders of such corporation shall choose to make, shall be deemed to be approved upon the affirmative vote of not less than two thirds of those members of such corporation voting thereon at such meeting or, if such corporation is a stock corporation, upon the affirmative vote of the holders of not less than two thirds of the capital stock of such corporation represented at such meeting.