N.C. Gen. Stat. § 142-92: Tax exemption.

Special indebtedness shall at all times be free from taxation by the State or any political subdivision or any of their agencies, excepting income taxes on the gain from the transfer of the indebtedness; and franchise taxes. The interest component of any payments made by the State under special indebtedness, including the interest component of any certificates of participation, is not subject to taxation as to income. (2003-284, s. 46.2; 2003-314, s. 1; 2004-203, s. 79; 2015-264, s. 16(h).)