N.C. Gen. Stat. § 106-267.1
Every person who shall test milk or cream in this State by, or sample milk for, the Babcock method or otherwise for the purpose of determining the percentage of butterfat or milk fat contained therein, where such milk or cream is bought and paid for on the basis of the amount of butterfat contained therein, shall first obtain a license from the Commissioner of Agriculture. Any person applying for such license or renewal of license shall make written and signed application on blanks to be furnished by the Commissioner of Agriculture. The granting of a license shall be conditioned upon the passing by the applicant of an examination, to be conducted by or under the direction of the Commissioner of Agriculture. All licenses so issued or renewed shall expire on December 31 of each year, unless sooner revoked, as provided in G.S. 106-267.3. A license fee of five dollars ($5.00) for each license so granted or renewed shall be paid to the Commissioner of Agriculture by the applicant before any license is granted.
N.C. Gen. Stat. § 106-267.1