N.C. Gen. Stat. § 106-408
All public livestock markets operating under this Article shall have proper facilities for handling livestock and such other equipment as specified by regulation of the North Carolina Board of Agriculture. Scales approved by the North Carolina Division of Weights and Measures shall be provided at public livestock markets where animals are bought, sold or exchanged by weight. The premises, including yards, pens, alleys, and chutes shall be cleaned and disinfected in accordance with regulations promulgated by the Board of Agriculture pursuant to the authority contained in G.S. 106-416. The market shall keep a complete legible permanent record, including the use of numbered invoices, showing the name and address of the person or firm from whom all animals are received and the name and address of the person or firm to whom sold. Symbols in lieu of names shall not be used. The weight, if sold by weight, and the price paid and the price received shall be recorded on the invoice. Such records as specified in this section shall be available for inspection to the Commissioner of Agriculture or his authorized representative during regular business hours.
The sales of all livestock at livestock auction markets shall start no later than 2:00 P.M.; provided, however, the Commissioner of Agriculture shall have authority to authorize a sale to begin as late as 4:00 P.M. when the sale (i) consists solely of the sale of pigs weighing no more than 150 pounds and sold as feeder pigs, (ii) continues without interruption, and (iii) lasts no later than 5:00 P.M., or when the sale consists solely of slaughter hogs sold by teleconference. The sale of livestock shall be continuous until all are sold.
Each public livestock market operator operating under this Article shall post notice of the day(s) of sale and the starting time in a conspicuous place on the market premises. In the event of subsequent changes in day of sale or starting time, the operator shall post notice on the premises and notify the State Veterinarian in writing at least two weeks in advance of the date of change.
N.C. Gen. Stat. § 106-408