Joining the ranks of several other states and local jurisdictions that have taken similar steps in the fight against pay disparity, Illinois will soon prohibit employers from asking job applicants about their salary histories as part of the hiring process. The new law — signed into law on July 31 and set to take effect on Sept. 29 — also includes other pay equity provisions that will require you — if you are an employer — to immediately adjust your hiring practices.What do Illinois employers need to …