The Weights and Measures (International Definitions) Order 1963
The Board of Trade, in pursuance of the powers conferred upon them by paragraph 2 of Part I, paragraph 4 of Part IV, paragraphs 5 of Part V and paragraph 1 of Part VI of Schedule 1 to the Weights and Measures Act 1963(a) and all other powers enabling them in that behalf, hereby order as follows :-