N.C. Gen. Stat. § 159D-55: Tax exemption.

The exercise of the powers granted by this Article will be in all respects for the benefit of the people of the State and will promote their health and welfare.

Any bonds or notes issued by the agency under the provisions of this Article are at all times be free from taxation by the State or any local unit or political subdivision or other instrumentality of the State, excepting inheritance or gift taxes, income taxes on the gain from the transfer of the bonds and notes, and franchise taxes. The interest on the bonds and notes is not subject to taxation as income. (1985 (Reg. Sess., 1986), c. 794, s. 21; 1995, c. 46, s. 5; 2000-179, s. 2.)