40-34-06. Sinking fund for payment of interest and principal

40-34-06. Sinking fund for payment of interest and principal If a service rate is charged to the users of an improvement made under this chapter, a sufficient portion of the moneys collected for such service shall be set aside as a sinking fund for the payment of the interest on the bonds and the principal thereof at maturity, and shall constitute a special fund which shall be used for no other purpose.