Section 22(3): amended, on 1 October 2008, by section 124(2) of the Policing Act 2008 (2008 No 72).
Section 22(5): amended, on 1 October 2008, by section 124(3) of the Policing Act 2008 (2008 No 72).
Section 22(8): added, on 20 July 2005, by section 103(3) of the Railways Act 2005 (2005 No 37).