Sec. 22. (a) The governing board may lease a part of the hospital buildings if the board determines that the use of the leased premises will aid the hospital in the performance of the hospital's services. A lease must:
(1) be in writing;
(2) be for definite periods; and
(3) require payment of lease rentals at least monthly.
(b) If the board enters into a lease or sublease contract with the state authority, the board may pledge as security for payment under the contract the funds that the governing board receives from a tax levy under section 27 of this chapter.