# The Weights and Measures Regulations 1963, Regulation 17


(1) Liquid capacity measures, made of copper or copper alloys shall be well tinned all over the inside; on plated measures the coating shall show no signs of peeling.
(2) On measures on which there are strengthening ribs or bands, such ribs or bands shall not take such a form as to show, by indentation or otherwise, any divisions on the measure which, in the opinion of the inspector, might reasonably be mistaken for graduations.

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Source: https://www.legislation.gov.uk/uksi/1963/1710/regulation/17 (the official version)
Page: https://openlegislation.uk/weights-and-measures-regulations-1963/regulation-17
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.