Revenue bonds issued under this chapter shall not be deemed to constitute a debt of this state or a pledge of the faith and credit of the state. The bonds shall be payable solely from the fund provided for in this chapter; and the issuance of the revenue bonds shall not directly, indirectly, or contingently obligate the state to levy or to pledge any form of taxation whatever therefor or to make any appropriation for the payment thereof. All such bonds shall contain recitals on their face covering substantially the foregoing provisions of this Code section; provided, however, that such funds as may be received from state appropriations or from any other source are declared to be available and may be used by the Department of Corrections for the performance of any lease contract entered into by the department.