A person who violates any provision of G.S. 63-20, 63-21 or 63-22 of this Article shall be guilty of a Class 2 misdemeanor; provided, however, that acts or omissions made unlawful by G.S. 63-20, 63-21 or 63-22 of this Article shall not be deemed to include any act or omission which violates the laws or lawful regulations of the United States. (1929, c. 190, s. 14; 1993, c. 539, s. 494; 1994, Ex. Sess., c. 24, s. 14(c).)