215 ILCS 5/251
The Director shall keep a record of the securities deposited by each company and when furnishing the annual certificate of valuation mentioned in section 249, he shall enter thereon the amount and market value of such securities deposited by such company. If at any time it shall appear from such certificate or otherwise that the value of the securities held on deposit is less than the reserve value of the registered policies theretofore issued by such company, less such liens (not exceeding such reserve value) as the company may have against them, and the company shall fail or neglect to make good such deposit within sixty days, after written notice by the Director, it shall be deemed to be insolvent and shall be proceeded against in the manner provided in Article XIII.
215 ILCS 5/251