205 ILCS 205/5002

(a) The capital of a stock savings bank shall be represented by capital stock and noncumulative perpetual preferred stock as authorized by the articles of incorporation, related paid-in surplus, retained earnings, and other forms of capital deemed to be qualifying capital by the insurance corporation providing insurance of the savings bank's deposits. (b) The capital of a mutual savings bank shall be represented by retained earnings and other forms of capital deemed to be qualifying capital by the insurance corporation providing insurance of the savings bank's deposits. (c) All shares and capital accounts shall be personal property and transferable as provided in this Act and the bylaws of the savings bank.