Section 172(3)(a): amended, on 1 October 2012, by section 271(5) of the Search and Surveillance Act 2012 (2012 No 24).
Section 172(3)(b): amended, on 1 October 2008, pursuant to section 116(a)(ii) of the Policing Act 2008 (2008 No 72).
Section 172(4): replaced, on 1 October 2012, by section 271(6) of the Search and Surveillance Act 2012 (2012 No 24).
Section 172(5): inserted, on 1 October 2012, by section 271(6) of the Search and Surveillance Act 2012 (2012 No 24).