# The Chemicals (Hazard Information and Packaging) Regulations 1993, Paragraph 4


Hazard warning signs shall have a line of the same colour as the symbol, 5 millimetres inside the edge and running parallel to it. (The broken line which surrounds each sign delineates the edge of that sign and need not be shown.)

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Source: https://www.legislation.gov.uk/uksi/1993/1746/schedule/3/paragraph/4 (the official version)
Page: https://openlegislation.uk/chemicals-hazard-information-and-packaging-regulations-1993/schedule-3/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.