N.C. Gen. Stat. § 62-62
All subpoenas for witnesses to appear before the Commission, a division of the Commission or a hearing commissioner or examiner and notice to persons or corporations, shall be issued by the Commission or its chief clerk or a deputy clerk and be directed to any sheriff or other officer authorized by law to serve process issued out of the superior courts, who shall execute the same and make due return thereof as directed therein, under the penalties prescribed by law for a failure to execute and return the process of any court. The Commission shall have the authority to require the applicant for a subpoena for persons and documents to make a reasonable showing that the evidence of such persons or documents will be material and relevant to the issue in the proceeding.
N.C. Gen. Stat. § 62-62