215 ILCS 5/468
All companies licensed to write workers' compensation and employers' liability insurance in this State shall participate in a plan providing for the equitable apportionment among them of insurance which may be afforded applicants who are in good faith entitled to but who are unable to procure such insurance through ordinary methods. Companies must submit such a plan for the Director's approval within 60 days of the effective date of this amendatory Act of 1982. The rates to be used in such a plan and any future modification thereof must be submitted to the Director for approval at least 30 days prior to their effective date. Such rates shall reflect residual market experience to the extent it is actuarially appropriate. The Director shall disapprove any filing that does not meet the requirements of subparagraph (d) of paragraph (1) of Section 456 of this Article. A filing shall be deemed to meet such requirements unless disapproved by the Director within 30 days after the filing is made. In disapproving a filing made under this Section, the Director shall have the same authority and shall follow the same procedure as in disapproving a filing under Section 458. Notwithstanding any other provisions of this Article, rating organizations may make and file rates under this Section.
215 ILCS 5/468