N.C. Gen. Stat. § 116-209.9

All bonds issued under the provisions of this Article shall have and are hereby declared to have all the qualities and incidents, including negotiability, of investment securities under the Uniform Commercial Code of the State but no provision of such Code respecting the filing of a financial statement to perfect a security interest shall be deemed applicable to or necessary for any security interest created in connection with the issuance of any such bonds.