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

Sec. 3. All contracts between an employee and a third person, copartnership, or corporation in which it is agreed that the employer of such employee shall be released from liability for damages of such employee arising out of the negligence of the employer, or in case of the death of such employee to his representative, are against public policy and are hereby declared null and void;  provided, that nothing in this chapter shall apply to voluntary relief departments or associations organized for the purpose of insuring employees.  Nothing in this chapter shall be construed to revert back to contracts made prior to March 11, 1901.  Nor shall this chapter affect litigation pending on March 11, 1901;  provided, that nothing in any section of this chapter shall be so construed as to affect or apply to any contract or agreement that may be made between the employer and employee, or in case of death his next of kin or his representative after an injury to the employee has occurred, but the provisions of this chapter shall apply solely to contracts made prior to any injury.