Ind. Code § 5-1.2-4-17

Sec. 17. The members of the authority, the officers and employees of the authority, the public finance director, any agents of the authority, and any other persons executing bonds issued under the referenced statutes are not subject to personal liability or accountability by reason of any act authorized by the referenced statutes, including without limitation the issuance of bonds, the failure to issue bonds, the execution of bonds, and the making of guarantees.