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The Weights and Measures Ordinance gives consumers protection against fraudulent or unfair trading practices in connection with quantity. It provides for offences for the supply of any goods by weight, measure or number short of the quantity purported to be supplied; the fraudulent use for trade of weighing and measuring equipment; and possession, manufacture, supply and use of false or defective equipment for use for trade. It also prohibits the sales of goods by weight or measure in the course of trade otherwise than by net weight or measure. The units and standards of measurement lawful for use for trade in Hong Kong are listed in the schedules to the Ordinance.