After issuance by a political subdivision, a certificate of indebtedness that recites that it is issued under this chapter is conclusively presumed to be fully authorized and issued under the
laws of the state, and any person or governmental unit is estopped from questioning its authorization, sale, execution, issuance, or delivery by the political subdivision.
21-02-15. Certificate of indebtedness exempt from state taxation - Review for exemption from federal taxation. Payments of the principal of and interest on a certificate of indebtedness issued under this chapter are exempt from all taxes, except inheritance, estate, and transfer taxes, imposed by this state, any county or city, or any other political subdivision. However, a political subdivision shall review, or cause to be reviewed, federal tax laws and regulations to determine the federal tax-exempt status of interest payments on a certificate of indebtedness prior to the issuance and sale of the certificate on a purported federally tax-exempt basis.