The “capital development program fund” is created as a nonreverting fund as a subaccount of the severance tax bonding fund. The fund consists of distributions, appropriations, gifts, grants, donations and income from investment of the fund. The department of finance and administration shall administer the fund. Money in the fund is subject to appropriation by the legislature to fund capital projects with a total cost of less than five million dollars ($5,000,000) and only the planning and design of capital projects with a total cost greater than that amount. Expenditures from the fund shall be by warrant of the secretary of finance and administration pursuant to vouchers signed by the secretary of finance and administration or the secretary’s authorized representative. Any unexpended or unencumbered balance of an appropriation for a capital project remaining after two years following the date of the appropriation shall revert to the severance tax permanent fund.