805 ILCS 315/15.4
No stockholder of an association, organized hereunder, except an association organized under this Act, or an association as defined in this Act or one subject to the "General Not for Profit Corporation Act," as heretofore or hereafter amended, shall own more than one-twentieth of the authorized common stock of the association; and an association in its by-laws may limit the amount of common stock which one member may own to an amount less than one-twentieth of the authorized common stock. The association shall limit its dividends on stock, both common and preferred, to any amount not greater than 8 per centum per annum, on the par value thereof, or if such capital stock is without par value, then upon the actual cash value of the consideration received by the association therefor. The association by the vote of its directors, may establish and accumulate reserves out of earnings, including a permanent surplus fund as an addition to capital. Net income in excess of additions to reserves and surpluses so established, shall be distributed to the members or patrons of the association on the basis of patronage. Any distribution of reserves and surpluses at any time shall be made to members or patrons at the time such distribution is ordered, on the basis of patronage. Any receipts or dividends from subsidiary corporations, or from stock or other securities owned by the association, shall be included in the ordinary receipts of the association.
805 ILCS 315/15.4