Under the Legal Metrology Act, 2009, weights and measures used or intended to be used in transactions or for the protection of consumers must be:

The Legal Metrology Act, 2009 requires that every weight or measure used in trade or for consumer protection be VERIFIED and STAMPED in the prescribed manner by the Legal Metrology authorities, and such verification is valid for the period or up to the event the Act/rules specify (with re-verification at the prescribed intervals). Use of a weight or measure that has not been duly verified and stamped is an offence. This verification-stamping regime ensures accuracy and traceability in commercial measurement. The mandatory verification/stamping is thus a defining compliance requirement of the Act.