Missouri Revised Statutes Title XVIII. Labor and Industrial Relations § 293.180. Protective clothing and devices to be worn

1. All persons shall wear protective hats while underground and also while on the surface where falling objects may cause injury, except where conditions are such that the wearer would be subjected to physical hardship.

2. Protective footwear shall be worn by employees, officials, and others while on duty in and around a mine where falling objects may cause injury, except where conditions are such that the wearer would be subjected to physical hardship.

3. All employees in or around the mines shall wear approved type goggles where there is a hazard from flying particles.

4. Welders and helpers shall use proper shields or goggles to protect their eyes.

5. Men exposed for short periods to gas, dust, fumes, and mist inhalation hazards shall wear permissible respiratory equipment. When the exposure is for prolonged periods, other measures to protect workmen or to reduce the hazard shall be taken.