Section 20A: inserted, on 1 July 1983, by section 2 of the Summary Offences Amendment Act (No 2) 1982 (1982 No 159).
Section 20A(1)(a): substituted, on 1 April 1987, by section 25(1) of the Official Information Amendment Act 1987 (1987 No 8).
Section 20A(1)(f): substituted, on 1 April 1987, by section 25(1) of the Official Information Amendment Act 1987 (1987 No 8).
Section 20A(2): amended, on 1 July 2013, by section 413 of the Criminal Procedure Act 2011 (2011 No 81).
Section 20A(2) proviso: amended, on 1 July 2013, by section 413 of the Criminal Procedure Act 2011 (2011 No 81).