215 ILCS 5/252

Any such company may increase its deposits at any time by making additional deposits of not less than five thousand dollars of securities which are authorized investments for life companies under this Code. Any company whose deposits exceed the reserve of all registered policies it has in force, less such liens (not exceeding such reserve value) as the company may hold against them, may withdraw such excess, or it may withdraw any of said securities at any time by depositing in their stead securities of equal value and authorized under this Code. So long as said company shall remain solvent and maintain its deposits, as herein provided, it may collect the interest, coupons, rents, and other income on the securities deposited as the same may accrue.