# The Dangerous Substances in Harbour Areas Regulations 1987, Paragraph 2


The side of the flag marked “a” on the diagram shown in Part I of this Schedule shall be not less than 75 centimetres in length and the sides of the flag marked “b” on the said diagram shall have equal lengths of not less than 90 centimetres.

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Source: https://www.legislation.gov.uk/uksi/1987/37/schedule/4/part/II/paragraph/2 (the official version)
Page: https://openlegislation.uk/dangerous-substances-in-harbour-areas-regulations-1987/schedule-4/part-II/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.