N.C. Gen. Stat. § 122C-347

North Carolina residents who are in treatment in another state may be returned to North Carolina either under an agreement authorized in G.S. 122C-346 or under the provisions of G.S. 122C-361. The cost of returning a North Carolina resident to this State is the responsibility of the sending state. Within 72 hours after admission in a State facility, a returned resident shall be evaluated. The returned resident may agree to a voluntary admission or may be released, or proceedings for an involuntary commitment under this Article may be initiated as necessary by the responsible professional in the facility.