Indiana Code Title 6. Taxation § 6-2.5-11-9

Sec. 9. (a) The agreement authorized by this chapter binds and inures only to the benefit of the state of Indiana and the other member states. No person, other than a member state, is an intended beneficiary of the agreement. Any benefit to a person other than a state is established by the law of the state of Indiana and the other member states and not by the terms of the agreement.

(b) Consistent with subsection (a), no person shall have any cause of action or defense under the agreement or by virtue of the state of Indiana's approval of the agreement. No person may challenge, in any action brought under any provision of law, any action or inaction by any department, agency, or other instrumentality of the state of Indiana, or any political subdivision of the state of Indiana on the grounds that the action or inaction is inconsistent with the agreement.

(c) No law of Indiana, or the application thereof, may be declared invalid as to any person or circumstance on the grounds that the provision or application is inconsistent with the agreement.