Sec. 27. (a) In connection with the issuance of refunding bonds, the authority and the lessee, or lessees, of the building, or buildings, financed from the proceeds of the bonds being refunded may enter into an amendment to the lease modifying the lease:
(1) to provide for a reduction in the amount of lease rental payable by the lessee, or lessees, to be effective upon the redemption of the bonds being refunded;
(2) to provide for an extension of the time set forth in the lease before the option of the lessee, or lessees, to purchase may be exercised to the time that is agreed upon between the authority and the lessee or lessees; or
(3) to provide that the lease rental payable by the lessee, or lessees, after the redemption of all the bonds being refunded is payable to the trustee under the trust indenture securing the refunding bonds.
(b) Proceedings or actions by the lessee and approval by any board, commission, or agency are not required for refunding. The refunding authorized in this chapter does not affect the obligation of the lessee, or lessees, to pay the lease rental under the lease of the building or buildings, except to the extent the lease rental may be reduced by any amendment as authorized by this section.