In January 2020, employers in states that have changed their marijuana laws will not be able to drug test employees at random nor for pre-employment, unless there is reasonable suspicion to believe an employee is under the influence while working.
Illinois and Missouri both apply, so whether you have a physical location in IL or MO, or are located in one of the next states to change their marijuana use laws– don’t end up unprepared for the impact that out-of-office marijuana use will have on the job.
You might want to check with your legal counsel to confirm these changes affect you and what your alternatives are.