Within 10 days after the meeting or written vote at which the members determine to convert into a federal credit union, the credit union shall file with the commissioner a certificate verified by the board of directors of such credit union. The certificate shall contain a copy of the minutes of the meeting or a copy of the written ballot and the results of the written vote and a statement that the members have approved the determination to convert such credit union into a federal credit union. A copy of such certificate shall be filed with the Secretary of State.