Ind. Code § 27-1-9-10
If not less than five percent (5%) of the members or policyholders in a mutual corporation who did not vote in favor of such merger or consolidation at the meeting at which the agreement of merger or consolidation was adopted by the members or policyholder of such corporation shall, at any time within thirty (30) days after the filing of the affidavit of notice of the adoption of the agreement of merger or consolidation as provided for in sections 3 and 4 of this chapter, file a petition with the department for a hearing upon the adoption of such agreement or merger or consolidation, the department shall order a hearing upon said petition and give notice fixing the time and place of such hearing to the corporations which are parties to the merger or consolidation fifteen (15) days before the date of such hearing. The company whose policyholders file such petition shall give notice by mail to each member or policyholder of such company, at least ten (10) days before such hearing. At the time and place fixed in such notice, or at the time or times and place or places to which such hearing shall be adjourned, the commissioner shall proceed with the hearing and make or order such examination into the affairs and condition of each of such corporations as he may deem proper. The commissioner shall have the power to summon and compel the attendance and testimony of witnesses and the production of books and papers before him at such hearing. Any member or policyholder, as the case may be, of the corporation so petitioning may appear before the commissioner and be heard with reference to said contract. If, upon such hearing being had, the commissioner is not satisfied that the interests of the members or policyholders, as the case may be, of such company are properly protected, or if he finds that any reasonable objection exists to such contract, he shall revoke the approval already given, and the said agreement of merger or consolidation shall thereupon become null and void. The commissioner shall have like power to revoke any approval of any such agreement of merger or consolidation if any officer, director, or employee of either corporation party to such agreement of merger or consolidation shall, after reasonable notice, fail or refuse to attend and testify at such hearing, or to produce any books or papers called for by said commissioner.
IC 27-1-9-10