If you don't get an answer from the state board, you can check with your proctor the day of the exam. Just make sure you check before the exams starts. Worst case is that they'll say you can't have it and make you put it away.
Generally you can bring them in unless your state board doesn't allow them.
The official NCEES policy is:
Reference materials
The PE exam is an open-book exam. You are allowed to bring reference materials to the exam, provided they are bound and remain bound during the exam. Loose paper may be bound with ring binders, brads, plastic snap binders, spiral-bound notebooks, and screw posts—but not with staples. Sticky notes and flags are permitted only when they remain attached to book pages
Some states have rules above and beyond NCEES. IL is one of the most strict and doesn't allow sample exams/solutions manuals or anything that is not copyrighted (no handwritten notes).