Correct answer
When on urgent duty and announcing its presence with the required signals.
When travelling on urgent duty and announcing its presence with the blue V-1 light and, normally, the special audible signal. Use the light alone when omitting the sound poses no danger to others. Amber V-2 does not confer priority, and carrying officers without urgent duty does not either. Priority vehicles must still avoid danger and always obey agents’ orders and signals.
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When on urgent duty and announcing its presence with the required signals.
Whenever an amber V-2 light is switched on, even without urgent duty.
Whenever carrying officers, even without urgent duty.
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