The regents shall issue revenue bonds in the name of the regents and as obligations of the regents, but neither the principal of, nor interest on, any bond issued or sold pursuant to this chapter shall be or become a lien, charge, or liability against this state or against the regents or against the property or funds of either, except to the extent of the pledge of revenues or part of revenues of the project, as may be provided by the indenture pursuant to which revenue bonds are issued, and every such bond issued by the regents shall contain a recital on its face, substantially as follows: “This bond is not a lien, charge, or liability, as to either principal or interest, against the State of California or against the Regents of the University of California or against the property or funds of either, except to the extent of the pledge of revenues or part of revenues, as provided by the indenture pursuant to which it is issued.”