N.C. Gen. Stat. § 7A-192

Any district judge may hear motions and enter interlocutory orders in causes regularly calendared for trial or for the disposition of motions, at any session to which the district judge has been assigned to preside. The chief district judge and any district judge designated by written order or rule of the chief district judge, may in chambers hear motions and enter interlocutory orders in all causes pending in the district courts of the district, including causes transferred from the superior court to the district court under the provisions of this Chapter. The designation is effective from the time filed in the office of the clerk of superior court of each county of the district until revoked or amended by written order of the chief district judge.