Every employer subject to any provision of sections 290.500 to 290.530 or of any regulations issued under sections 290.500 to 290.530 shall keep a summary of sections 290.500 to 290.530, approved by the director, and copies of any applicable wage regulations issued under sections 290.500 to 290.530, or a summary of the wage regulations posted in a conspicuous and accessible place in or about the premises wherein any person subject thereto is employed. Employers shall be furnished copies of the summaries and regulations by the state on request without charge.
§ 290.522, RSMo