The faith of the State is hereby pledged that the State Securities Law, any law supplemental or otherwise appertaining thereto, and any other act concerning the bonds or other state securities, taxes or the pledged revenues or any combination of such securities, such taxes and such revenues, shall not be repealed nor amended or otherwise directly or indirectly modified in such a manner as to impair adversely any outstanding state securities, until all such securities have been discharged in full or provision for their payment and redemption has been fully made, including without limitation the known minimum yield from the investment or reinvestment of moneys pledged therefor in federal securities.