If the commissioner approves and authorizes the proposed merger or consolidation or issuance and exchange of stock, such merger or consolidation or issuance and exchange of stock shall become effective upon the filing in the office of the Secretary of the State, a copy of the certificate of merger or consolidation as to the terms of merger or consolidation or certificate as to the terms of the issuance and exchange of stock and the certificate of the commissioner approving and authorizing the proposed merger or consolidation or issuance and exchange of stock.