When the issue in an Australian court is simply whether an individual is a national of a foreign power, that issue is ordinarily determined by reference to the municipal law of the foreign power [48] . The general rule, however, is subject to qualifications, one of which is stated by Lord Cross in Oppenheimer v. Cattermole [49] :
If a foreign country purported to confer the benefit of its protection on and to exact a duty of allegiance from persons who had no connexion or only a very slender connexion with it our courts would be entitled to pay no regard to such legislation on the ground that the country in question was acting beyond the bounds of any jurisdiction in matters of nationality which international law would recognize. In this respect I think that our law is the same as that of the United States as stated by the Circuit Court of Appeals, Second Circuit, in United States ex rel. Schwarzkopf v. Uhl [50] .
That qualification has no application either to the second or to the third respondent. Each was born and grew up as a citizen of a foreign power before coming to live in Australia. Each, by the respective laws of those foreign powers, remains a citizen of that power. Each, by those respective laws, owes allegiance to a foreign power. True it is that each purported to renounce his citizenship of, and allegiance to, his native country when he became an Australian citizen but that renunciation was ineffective to alter his status and obligations under the law of his native country. There is no reason to hold that the application of the laws of the second and third respondents' respective native countries exceeds the jurisdiction in matters of nationality which international law would recognize.
1. [1976] A.C. 249, at pp. 278-279; see also pp. 261, 263-264, 267.
2. R. v. Burgess; Ex parte Henry (1936), 55 C.L.R., at pp. 649, 673.
3. [1955] I.C.J., at pp. 13, 17.
4. ibid., at p. 20.
5. ibid., at p. 22.
6. ibid., at p. 22.
7. Signed at The Hague, 12 April 1930, 179 League of Nations Treaty Series 89, at pp. 99, 101.
8. R. v. Burgess; Ex parte Henry (1936), 55 C.L.R., at p. 649.
9. [1976] A.C., at p. 277.
10. (1943) 137 F. 2d 898.