All money held in any bond reserve fund, except as otherwise expressly provided in this chapter, must be used, as required, solely for the payment of the principal of bonds secured in whole or in part by the fund or of the sinking fund payments with respect to such bonds, the purchase or redemption of such bonds, the payment of interest on such bonds or the payment of any redemption premium required to be paid when the bonds are redeemed before maturity.
NRS 319.340