At the time of preparing the annual budget, a school board, by resolution, may transfer from the general fund of the district the amount of money, in whole or in part, by which the balance in the general fund exceeds the amount that would be required for the general reserve fund in the ensuing fiscal year, into any sinking funds of the district established and held for the payment of outstanding bonds.
N.D.C.C. § 15.1-07-08