Ind. Code § 22-3-7-5

Sec. 5. On and after April 1, 1963, the provisions of this chapter shall apply to the state, to all political divisions thereof, to all municipal corporations within the state, to persons, partnerships, limited liability companies, and corporations engaged in mining coal, and to employees thereof, without any right of exemption from the compensation provisions of this chapter, except as provided in section 34(i) of this chapter.