Section 54(2): amended, on 19 February 2019, by section 13(1) of the Crown Minerals Amendment Act 2019 (2019 No 2).
Section 54(2)(a): substituted, on 28 September 1993, by section 10 of the Crown Minerals Amendment Act 1993 (1993 No 139).
Section 54(2)(b): substituted, on 28 September 1993, by section 10 of the Crown Minerals Amendment Act 1993 (1993 No 139).
Section 54(3): replaced, on 24 May 2013, by section 39 of the Crown Minerals Amendment Act 2013 (2013 No 14).
Section 54(3)(b): replaced, on 19 February 2019, by section 13(2) of the Crown Minerals Amendment Act 2019 (2019 No 2).