North Carolina Administrative Code Title 17 — Revenue 17 NCAC 04C .0602 — Invoice Requirement Last amended: Authority G.S. 105-113.10; 105-262; Eff. February 1, 1976; Amended Eff. October 30, 1981; June 11, 1977; Repealed Eff. January 1, 2021. Source: official text