Indiana Code Title 4. State Offices and Administration § 4-32.3-5-6

(a) If a facility, location, or personal property is leased for an allowable activity, the rent may not be based in whole or in part on the revenue generated from the event.

(b) A facility or location may not be rented for more than three (3) days during a calendar week for an allowable activity.  This subsection does not apply to a festival license.