Idaho Const. art. IX, § 3

The public school permanent endowment fund of the state shall forever remain inviolate and intact; the earnings of the public school permanent endowment fund shall be deposited into the public school earnings reserve fund and distributed in the maintenance of the schools of the state, and among the counties and school districts of the state in such manner as may be prescribed by law. No part of the public school permanent endowment fund principal shall ever be transferred to any other fund, or used or appropriated except as herein provided. Funds shall not be appropriated by the legislature from the public school earnings reserve fund except as follows: the legislature may appropriate from the public school earnings reserve fund administrative costs incurred in managing the assets of the public school endowment including, but not limited to, real property and monetary assets. The state treasurer shall be the custodian of these funds, and the same shall be securely and profitably invested as may be by law directed. As defined and prescribed by law, the state shall supply losses to the public school permanent endowment fund, excepting losses on moneys allocated from the public school earnings reserve fund.