# Justice and Security (Northern Ireland) Act 2007, Section 21: Stop and question


(1) A member of Her Majesty's forces on duty or a constable may stop a person for so long as is necessary to question him to ascertain his identity and movements.
(2) A member of Her Majesty's forces on duty may stop a person for so long as is necessary to question him to ascertain—
(a) what he knows about a recent explosion or another recent incident endangering life;
(b) what he knows about a person killed or injured in a recent explosion or incident.
(3) A person commits an offence if he—
(a) fails to stop when required to do so under this section,
(b) refuses to answer a question addressed to him under this section, or
(c) fails to answer to the best of his knowledge and ability a question addressed to him under this section.
(4) A person guilty of an offence under this section shall be liable on summary conviction to a fine not exceeding level 5 on the standard scale.
(5) A power to stop a person under this section includes a power to stop a vehicle (other than an aircraft which is airborne).

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Source: https://www.legislation.gov.uk/ukpga/2007/6/section/21 (the official version)
Page: https://openlegislation.uk/justice-and-security-northern-ireland-act-2007/section-21
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.