At least one-half of the whole amount of the several permanent funds, as computed by the commissioner of university and school lands at the end of each fiscal year, must be invested in first mortgages on farmlands and rangelands in this state if there is a sufficient demand for investment in farm loans. First mortgage loans on farmlands and rangelands must be made only in accordance with the provisions of this chapter.
N.D.C.C. § 15-03-05