Trade approved scales are a particular set of scales approved by The National Measuring Institute. Each model scale has a unique code to show certification of approval.  If your business sells goods by weight or measure to the public in Australia, then by law it is required to use a verified trade approved scale or other types of verified weighing equipment. The National Measurement Institute (NMI) approves a particular scale as a trade approved scale only if it is in accordance with their regulations. If your business sells to the Australian public and does not use trade approved scales, you could be risking a fine or worse losing credibility among your customers.