A. The state board of finance may issue and sell at public or private sale severance tax bonds to refund outstanding severance tax bonds by exchange, immediate or prospective redemption, cancellation or escrow, including the escrow of debt service funds accumulated for payment of outstanding bonds, or any combination thereof when, in its opinion, such action will be beneficial to the state.
B. The state board of finance may issue and sell at public or private sale supplemental severance tax bonds to refund outstanding supplemental severance tax bonds by exchange, immediate or prospective redemption, cancellation or escrow, including the escrow of debt service funds accumulated for payment of outstanding supplemental severance tax bonds, or any combination thereof when, in its opinion, such action will be beneficial to the state.