215 ILCS 5/233
After the calendar year during which this Code becomes effective, no life company authorized to do business in this State shall issue both participating and non-participating policies unless at least ninety per centum of the profits on its participating policies shall inure to the benefit of the participating policyholders. Any company having in force both participating and non-participating policies shall keep a separate accounting for each class of business and shall make and include in the annual statement to be filed with the Director each year a separate statement showing the gains, losses and expenses properly attributable to each of such classes and also showing the manner in which any general outlay of expense of the company has been apportioned to each except that this provision shall not apply to any company in which ninety per centum or more of the business in force is either participating or non-participating. This section shall not apply to business done by such life company outside this state, nor to paid-up, or temporary insurance or pure endowment benefits issued or granted pursuant to the non-forfeiture provision prescribed in clause (g) of sub-section (1) of Section 224 nor to annuities or policies of reinsurance.
215 ILCS 5/233