Indiana Code Title 8. Utilities and Transportation § 8-21-9-13

Sec. 13. The department may adopt such rules as it may deem advisable for the control and regulation of any airport or airport facility or traffic on any airport or airport facility, for the protection of and preservation of property under its jurisdiction and control, and for the maintenance and preservation of good order within the property under its control.  However, such rules must provide that public officers shall be afforded ready access, while in performance of their official duty, to all property under the jurisdiction or control of the department without the payment of tolls.