# The Dockyard Port of Plymouth Order 1999, Paragraph 12: Use of whistle


A whistle shall not be used within the limits of the Dockyard Port except—
(a) in accordance with the Rules contained in Schedule 2 to this Order;
(b) as a signal of distress;
(c) to prevent collision;
(d) in any condition affecting visibility;
(e) to test the whistle, provided that permission to do so has first been obtained from the Queen’s Harbour Master.

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Source: https://www.legislation.gov.uk/uksi/1999/2029/schedule/1/paragraph/12 (the official version)
Page: https://openlegislation.uk/dockyard-port-of-plymouth-order-1999/schedule-1/paragraph-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.