Bell-Booth Group Ltd v Attorney-General[1989] NZCA 9, [1989] 3 NZLR 148 (21 February 1989); South Pacific Mfg Co Ltd v New Zealand Security Consultants & Investigations Ltd and Monensen v Laing, [1992] 2 NZLR 282; Balfour v Attorney-General, [1991] 1 NZLR 519