In this Part—

• “act of terrorism” has the same meaning as in the Terrorism Act 2000 (c. 11);

• “chief officer of police” means—

  1. a

     in relation to any premises in F2England and Wales , the chief officer of police for the area in which the premises are situated; and

  2. aa

     F1in relation to any premises in Scotland, the chief constable of the Police Service of Scotland; and

  3. b

     in relation to any premises in Northern Ireland, the Chief Constable of the Police Service of Northern Ireland;

• “dangerous substance” has the meaning given in section 58;

• “direction” means a direction in writing;

• “notice” means a notice in writing;

• “occupier” includes a partnership or unincorporated association and, in relation to premises that are unoccupied, means any person entitled to occupy the premises;

• “prescribed” means prescribed in regulations made by the Secretary of State; and

• “relevant premises” has the meaning given in section 60.

In this Part references to measures taken to ensure the security of any dangerous substance are to be construed in accordance with section 60.