Ill. Admin. Code tit. 50, § 9100.80
a) Upon the determination of any party in interest or on its own motion, the Commission shall hold a hearing or hearings to determine whether the following events have occurred:
4) execution has been levied against the self-insured employer and has been returned unsatisfied in whole or in part; and if so, the amounts of compensation and medical expenses which remain unpaid from time to time to persons who have filed unsatisfied judgments against the insolvent self-insured employer. Upon the determination by the Commission of the extent of the insolvent self-insured employer's outstanding liability, the Commission shall issue an initial order of assessment within 30 days against each employer who has been granted authority to self insure under Section 4(a) of the Workers' Compensation Act which will be paid into the Self-Insured Employers Liability Fund. The order shall provide for a sum sufficient to secure estimated payments of compensation, medical expenses and administrative charges of the fund for a period of one year following the date of the order; and
(Source: Added at 9 Ill. Reg. 3705, effective March 12, 1985)