Section 23(1): amended, on 1 April 1987, by section 4(2) of the Official Information Amendment Act 1987 (1987 No 8).
Section 23(1)(b): amended, on 1 July 1993, by section 4(1) of the Official Information Amendment Act 1993 (1993 No 36).
Section 23(2A): inserted, on 1 July 1993, by section 4(2) of the Official Information Amendment Act 1993 (1993 No 36).
Section 23(2B): inserted, on 1 July 1993, by section 4(2) of the Official Information Amendment Act 1993 (1993 No 36).
Section 23(3): amended, on 1 April 1987, by section 9(2) of the Official Information Amendment Act 1987 (1987 No 8).
Section 23(5): replaced, on 1 March 2002, by section 170(1) of the Public Trust Act 2001 (2001 No 100).
Section 23(6): inserted, on 18 September 2004, by section 175(1) of the Health Practitioners Competence Assurance Act 2003 (2003 No 48).