Ind. Code § 5-1-4-18

Sec. 18. Rents and Charges. Each Authority shall fix, revise, charge and collect rents for the use of each project and contract with any participating hospital, in respect thereof. Each lease entered into by an Authority with a participating hospital shall provide that the rents payable by the participating hospital shall be sufficient at all times (a) to pay its share of the administrative costs and expenses of such Authority, (b) to pay the cost of maintaining, repairing and operating the project and each and every portion thereof, (c) to pay the principal of, the premium, if any, and the interest on outstanding bonds of the Authority issued in respect of such project as the same shall become due and payable, and (d) to create and maintain reserves which may but need not be required or provided for in the bond resolution or trust agreement relating to such bonds of the Authority.