# Geneva Conventions Act 1957, Paragraph 3


Medical vehicles should exhibit one or more flashing blue lights visible from as far away as possible. The High Contracting Parties and, in particular, the Parties to the conflict which use lights of other colours should give notification of this.

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Source: https://www.legislation.gov.uk/ukpga/Eliz2/5-6/52/schedule/FIFTH/part/VI/chapter/21/paragraph/3 (the official version)
Page: https://openlegislation.uk/geneva-conventions-act-1957/schedule-FIFTH/part-VI/chapter-21/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.