Every assignment or transfer of stock shall be recorded in the books of the association, and each shareholder shall be liable jointly with the association as well as severally, for the debts of the association only to the extent of the amount that may be unpaid upon the share or shares held by him. No assignor of a share or shares shall be released from any such indebtedness by reason of the assignment of his share or shares, but shall remain liable jointly with the assignee and the association, or severally until the stock is fully paid up.
     No assignment shall be made to any person who already holds shares of stock to the limit provided for in this Act and any assignment of stock shall be made only with the approval of a majority of the directors, and no transfer of stock shall be made except by the consent of the directors as shown on the records of the association: Provided, that any person demanding the assignment or transfer of any share or shares in such association to himself shall have the right to appeal from the action of the board of directors, to the members of the association at its first regular or special meeting thereafter, and ask that he be admitted to the association as a shareholder, and the action of the shareholders at such meeting shall be final; and also provided that such shareholders shall not have the power to direct the transfer of stock to any person in excess of the amount which such individual shareholder may hold under the terms of this Act.