820 ILCS 105/9
Every employer subject to any provision of this Act or of any regulations issued under this Act shall keep a summary of this Act approved by the Director, and copies of any applicable regulations issued under this Act or a summary of such regulations, posted in a conspicuous and accessible place in or about the premises wherever any person subject to this Act is employed. Every employer subject to any provision of this Act or any regulations issued under this Act with employees who do not regularly report to a physical workplace, such as employees who work remotely or travel for work, shall also provide the summaries and regulations by email to its employees or conspicuous posting on the employer's website or intranet site, if such site is regularly used by the employer to communicate work-related information to employees and is able to be regularly accessed by all employees, freely and without interference. Employers shall be furnished copies of such summaries and regulations by the State on request without charge.
820 ILCS 105/9