Revenue bonds issued under this part shall not be deemed to constitute a debt of the State of Georgia or a pledge of the faith and credit of the state. Such bonds shall be payable solely from the fund provided for in Code Section 12-3-374, and the issuance of such 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 faces covering substantially the foregoing provisions of this Code section.