Wyo. Stat. Ann. § 21-17-409

21-17-402 through 21-17-450 to impair securities. The faith of the state is hereby pledged that this act, any law supplemental or otherwise appertaining thereto and any other act concerning the bonds and other securities of the board or the university or the pledged revenues shall not be repealed nor amended or otherwise directly or indirectly modified in such a manner as to impair adversely any outstanding securities of the board until all such securities payable from the pledged revenues have been discharged in full or provision has been fully made therefor, including without limitation the known minimum yield from the investment or reinvestment of monies pledged therefor in investments under W.S. 21-17-426.