Indiana Code Title 22. Labor and Safety § 22-10-3-14

Sec. 14. A mine shall be supervised by one (1) or more certified mine foremen who shall see that compliance with mining laws that pertain to the commercial mine's duties and to the health and safety of the employees is met.  When the mine workings are so extensive that the mine foremen are unable personally to carry out the duties required of them by law, the operator shall employ a sufficient number of properly certified assistants who shall act under the direction of the mine foremen.  The mine foremen or their assistants shall not permit a person to work in an unsafe place except for the purpose of making it safe, and such work shall be under the direction and instruction of a certified official.