215 ILCS 125/2-5
Every Health Maintenance Organization shall, at all times, maintain liabilities in an amount estimated in the aggregate to provide for the payment of all claims incurred and any due and unpaid provider capitation, whether reported or unreported, which are unpaid and for which such organization is or may be liable, and to provide for the expense of adjustment or settlement of such claims. Such liabilities shall be computed in accordance with regulations promulgated by the Director upon reasonable consideration of the ascertained experience and character of such business for the purpose of adequately protecting enrollees and securing the solvency of such organizations.
Whenever the claim and claim expense experience of any such organization shows the liabilities calculated in accordance with such regulations to be inadequate, the Director may require such organization to maintain additional liabilities.
215 ILCS 125/2-5