Section 10. State university funds. The funds of the Montana university system and of all other state institutions of learning, from whatever source accruing, shall forever remain inviolate and sacred to the purpose for which they were dedicated. The various funds shall be respectively invested under such regulations as may be provided by law, and shall be guaranteed by the state against loss or diversion. The interest from such invested funds, together with the rent from leased lands or properties, shall be devoted to the maintenance and perpetuation of the respective institutions.