Mo. Rev. Stat. § 292.130
Current with changes from the 2024 Legislative Session
In all establishments in this state wherein labor is employed, where any process is carried on by which dust or smoke is generated, the director of the inspection section and his assistants and deputies shall have the power and the authority to order that a fan or some other contrivance be put in to prevent the inhalation of such dust or smoke by employees.
§ 292.130, RSMo