Section 34(1) in The Standards of Weights and Measures (Enforcement) Act, 1985
(1)Any custom, usage, practice or method of whatever nature which permits a person to demand, receive, or cause to be demanded or received, any quantity of article, thing or service in excess of, or less than, the quantity specified by weight, measure or number in any contract or other agreement in relation to the said article, thing or service, shall be void.
