Section 215 ILCS 5/539 - Plan of operation(a) The Fund shall submit to the Director a plan of operation and any amendments thereto necessary or suitable to assure the fair, reasonable, and equitable administration of the Fund. The plan of operation and any amendments thereto shall become effective upon approval in writing by the Director.(b) If the Fund fails to submit a suitable plan of operation within 90 days following the effective date of this Article or if at any time thereafter the Fund fails to submit suitable amendments to the plan of operation, the Director shall, after notice and hearing pursuant to Sections 401, 402 and 403 of this Code, adopt and promulgate such reasonable rules as are necessary or advisable to effectuate the provisions of this Article. Such rules shall continue in force until modified by the Director or superseded by a plan of operation submitted by the Fund and approved by the Director.(c) All member companies must comply with the plan of operation.