The answer to your question can be found in: NC Gs 14-269.2, paragraph G, subsection 1a.( A person exempted by the provisions of G.S. 14‑269(b).)
Which refers back to 14-269, paragraph b, section 5 , which exempts LEO. ( Sworn law‑enforcement officers, when off‑duty, provided that an officer does not carry a concealed weapon while consuming alcohol or an unlawful controlled substance or while alcohol or an unlawful controlled substance remains in the officer's body)
Only one of the conditions in section (b) has to be met.
It Does not state that officer has to be in his jurisdiction.