The mandatory DECLARATION of quantity and price on packaged commodities, and the use of STANDARD weights and measures in trade, are regulated primarily by:

Explanation: The Legal Metrology Act, 2009 (together with the Legal Metrology (Packaged Commodities) Rules 2011) governs the standards of weights and measures and the declaration of quantity, price, net content and the manufacturer's details on PACKAGED COMMODITIES. It replaced the old Standards of Weights and Measures Act, 1976, and updated the regime for consumer-facing measurement transparency. The Essential Commodities Act concerns supply control, and the Consumer Protection Act consumers' sales remedies. Legal Metrology is thus the measurement-and-labelling statute, protecting purchasers from under-filled or mis-declared goods.