Workers compensation reform bills to advance Illinois Gov. Bruce Rauner’s fiscal turnaround plan for the state have been filed in the state House of Representatives and Senate. In an effort to tighten regulations, H.B. 4223, filed Friday by Republican state Rep. Jim Durkin, would require an injured worker to prove that an “accidental injury arising out of the course of employment is the major contributing cause of the medical condition or injury for which compensation is sought.”