If the proposed amendment, with any changes, is approved by the affirmative vote of not less than two - thirds of those members voting thereon at such meeting, articles of amendment shall be executed and acknowledged on behalf of the cooperative by its president or vice - president and its seal shall be affixed thereto and attested by its secretary. Source: SL 1947, ch 33 , § 15; SDC Supp 1960, § 11.2215.