Section 7(3) in The Punjab Standards of Weights and Measures (Enforcement) Rules, 1993
(3)Every working standard balance shall be verified at last once a year and shall be adjusted, if necessary, to make it correct within the limits of sensitivity and other metrological qualities prescribed under the Standards Act, as the case may be, by the Laboratory-in-charge of the Reference Standard Laboratory or by the Controller or such other officer as may be authorised by the Controller in the behalf.
