N.J. Stat. § 51:8-6: Sale by weight only; pounds to the ton; weighmaster to weigh

All solid fuel shall be sold by weight. It shall be unlawful for any person to sell or deliver or start out for delivery less than two thousand pounds by weight to the ton of solid fuel or a proper proportion thereof when the quantity to be delivered is less than a ton, and such solid fuel shall, except as otherwise herein provided, be duly weighed by a weighmaster designated to weigh solid fuel, on stationary scales suitable for weighing solid fuel, which have been tested and sealed by any authorized weights and measures officer.