What is a requirement for scales used in trade?

The requirement for scales used in trade includes the necessity for the scale to be marked with its capacity. This is essential because it informs users about the maximum weight that can be measured on that scale, ensuring safety and accuracy in transactions. Having a clear indication of the scale's capacity helps prevent overload, which can lead to damage to the scale and inaccuracies in weight measurements. This marking is part of regulatory standards aimed at maintaining fairness in commerce, protecting both consumers and traders. This is particularly important in environments like grocery stores, shipping facilities, or any setting where precise weight measurements directly affect pricing and trade.