Mo. Rev. Stat. § 292.410: Duty of director of inspection section.

It shall be the duty of the director of the inspection section to enforce the provisions of sections 292.300 to 292.440 and to prosecute all violations of the same before any associate circuit judge or any court of competent jurisdiction in this state, and for that purpose the director of the inspection section and his assistants are empowered to and shall visit and inspect, at least once a year, and at reasonable hours, and as often as practicable, all places of employment covered by the provisions of sections 292.300 to 292.440.