N.C. Gen. Stat. § 66-14
No more than one case of each brand of matches of any type or manufacture shall be opened at any one time in the retail store where matches are sold or otherwise disposed of; nor shall loose boxes or paper-wrapped packages of matches be kept on shelves or stored in such retail stores at a height exceeding five feet from the floor; all matches when stored in warehouses must be kept only in properly secured cases, and not piled to a height exceeding 10 feet from the floor; nor be stored within a horizontal distance of 10 feet from any boiler, furnace, stove, or other like heating apparatus; nor within a horizontal distance of 25 feet from any explosive material kept or stored on the same floor. All matches shall be packed in boxes or suitable packages, containing not more than 700 matches in any one box or package: Provided, however, that when more than 300 matches are packed in any one box or package the said matches shall be arranged in two nearly equal portions, the heads of the matches in the two portions shall be placed in opposite directions, and all boxes containing 350 or more matches shall have placed over the matches a center-holding or protecting strip, made of chip board, not less than one and one-quarter inches wide; said strip shall be flanged down to hold the matches in position when the box is nested into the shuck or withdrawn from it.
N.C. Gen. Stat. § 66-14