# Parliamentary Voting System and Constituencies Act 2011, Paragraph 18


The referendum ballot papers must be of a different colour from the colour of the constituency ballot papers or the regional ballot papers.

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Source: https://www.legislation.gov.uk/ukpga/2011/1/schedule/7/paragraph/18 (the official version)
Page: https://openlegislation.uk/parliamentary-voting-system-and-constituencies-act-2011/schedule-7/paragraph-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.