Indiana Code Title 22. Labor and Safety § 22-3-2-4

Sec. 4. (a) Every contract of service between any employer and employee covered by IC 22-3-2 through IC 22-3-6, written or implied, in operation on May 21, 1929, or made or implied prior to May 21, 1929, shall, after May 21, 1929, be presumed to continue;  and every such contract made subsequent to May 21, 1929, shall be presumed to have been made subject to the provisions of IC 22-3-2 through IC 22-3-6 unless either party, except as provided in section 15 of this chapter, shall give notice, as provided in section 9 of this chapter, to the other party to such contract that the provisions of IC 22-3-2 through IC 22-3-6 (other than IC 22-3-4-13) are not intended to apply.

(b) A like presumption shall exist equally in the case of all minors unless notice of the same character be given by or to the parent or guardian of the minor.