Leung, Vincent Tze Ching & Anor v Minister for Immigration & Multicultural Affairs [1997] FCA 1313

FEDERAL COURT OF AUSTRALIA CITIZENSHIP - revocation of a certificate granted under s 13(1) of the Citizenship Act 1948 (Cth) ADMINISTRATIVE LAW - revocation of an administrative decision - when is a decision-maker functus officio - is an invalid administrative decision valid until set aside by a court - presumption of regularity - effect of a decision procured by fraud or misrepresentation Acts Interpretation Act 1901 (Cth) s 33(3) Australian Citizenship Act 1948 (Cth) ss 13(1)(a)(d)(e), (4)(b)(i) Ainsworth v Wilding [1896] 1 Ch 673 mentioned Chandler & Ors v Alberta Association of Architects [1989] 2 SCR 848 applied Comptroller General of Customs v Kawasaki Motors Pty Ltd (No 1) (1991) 32 FCR 219 discussed Grillas v Minister of Manpower & Immigration [1972] SCR 527 discussed Hoffmann-La Roche & Co A.G. v Secretary of State for Trade and Industry [1975] AC 295 considered Jayasinghe v Minister for Immigration and Ethnic Affairs (1997) 145 ALR 532 mentioned Lange v Board of School Trustees of School District No 42 (1978) 9 BCLR 232 applied Ousley v The Queen (unreported, High Court, 20 October 1997) considered Posner v Collector for Inter-State Destitute Persons (Vic) (1946) 74 CLR 461 considered Pearce v City of Coburg [1973] VR 583 mentioned Preston Banking Co v Allsup & Sons [1895] 1 Ch 141 mentioned Re 56 Denton Road, Twickenham Middlesex [1953] 1 Ch 51 discussed R v Home Secretary; Ex parte Khawaja [1984] 1 AC 74 applied Rootkin v Kent County Council [1981] 1 WLR 1186 discussed R v Wicks [1997] 2 WLR 876 applied Re Trizec Equities Ltd v Area Assessor Burnaby-New Westminster (1983) 147 DLR (3d) 637 applied R v Secretary of State for Home Department; Ex parte Choudhary [1978] 1 WLR 1178 applied R v Secretary of State for Home Department; Ex parte Hussein [1978] 1 WLR 700 applied Re St Nazaire Co (1879) 12 ChD 88 mentioned Re Swire (1885) 30 ChD 239 mentioned Sloane v Minister for Immigration, Local Government and Ethnic Affairs (1992) 37 FCR 429 discussed Smith v East Elloe Rural District Council [1956] AC 736 considered Zamir v Secretary of State for Home Department [1980] AC 930 applied