(1) Any person who assaults a constable in the execution of his duty, or a person assisting a constable in the execution of his duty, shall be guilty of an offence and liable on summary conviction to imprisonment for a term not exceeding six months or to a fine not exceeding level 5 on the standard scale, or to both.
(2) Any person who resists or wilfully obstructs a constable in the execution of his duty, or a person assisting a constable in the execution of his duty, shall be guilty of an offence and liable on summary conviction to imprisonment for a term not exceeding one month or to a fine not exceeding level 3 on the standard scale, or to both.
(3) This section also applies to a constable who is a member of the Police Service of Scotland or Northern Ireland when he is executing a warrant, or otherwise acting in England or Wales, by virtue of any enactment conferring powers on him in England and Wales.
(4) In this section references to a person assisting a constable in the execution of his duty include references to any person who is neither a constable nor in the company of a constable but who—
(a) is a member of an international joint investigation team that is led by a member of a police force ...; and
(b) is carrying out his functions as a member of that team.
(5) In this section “international joint investigation team” means any investigation team formed in accordance with—
(a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(c) any international agreement to which the United Kingdom is a party and which is specified for the purposes of this section in an order made by the Secretary of State.
(6) A statutory instrument containing an order under subsection (5) shall be subject to annulment in pursuance of a resolution of either House of Parliament.