N.C. Gen. Stat. § 81A-61: Approval of devices used.

When making a weight determination, a public weighmaster shall use a weighing device that is of a type suitable for the weighing of the product to be weighed and that has been tested and approved for use by the Commissioner or by the public weighmaster's local or state weights and measures officials within the 12-month period immediately preceding the date of the weighing. (1939, c. 285, s. 10; 1975, c. 544; 1981, c. 607, s. 6; 2009-87, s. 2.)