Section 23(1): amended, on 30 August 2011, by section 4(1) of the Duties of Statutory Officers (Census and Other Remedial Provisions) Act 2011 (2011 No 64).
Section 23(3): replaced, on 7 July 2010, by section 6 of the Statistics Amendment Act 2010 (2010 No 86).
Section 23(3A): inserted, on 28 October 2021, by section 3 of the Secondary Legislation Act 2021 (2021 No 7).
Section 23(4): inserted, on 30 August 2011, by section 4(2) of the Duties of Statutory Officers (Census and Other Remedial Provisions) Act 2011 (2011 No 64).
Section 23(5): inserted, on 30 August 2011, by section 4(2) of the Duties of Statutory Officers (Census and Other Remedial Provisions) Act 2011 (2011 No 64).