Section 22(5) in The M.P. Standards of Weights and Measures (Enforcement) Rules, 1989
(5)To ensure a proper check of the accuracy of a weighing instrument the user shall keep at the site of each weighing instrument duly verified and stamped weights equal to one-tenth of the capacity of the instrument or one tonne whichever is less :Provided that the Controller may specify the total number of verified and stamped weights to be maintained in trade premises where the number of weighing instruments is more than one.
