Indiana Code Title 27. Insurance § 27-2-10-8

Sec. 8. The insurance commissioner shall have the power to make such rules as may be necessary for the execution of the functions vested in him by sections 1 through 7 of this chapter and may for such purpose classify domestic stock insurance companies, securities, and other persons or matters within his jurisdiction.  No provision of sections 1, 2, and 3 of this chapter imposing any liability shall apply to any act done or omitted in good faith in conformity with any rule of the insurance commissioner, notwithstanding that such rule may, after such act or omission, be amended or rescinded or determined by judicial or other authority to be invalid for any reason.