I consider that a person who has immigrated into Australia will pass beyond the range of the power when the act of immigration is at an end - i.e., when that person has become a full member of the Australian community.
It may well be, with the coming into force in 1987 of the 1984 amendments to the Citizenship Act, that a situation has evolved such that persons who had not been absorbed into the community could only thereafter be absorbed upon the acquisition of citizenship. Perhaps also the situation had evolved with the coming into force of s. 12 of the Migration Act in 1984 that persons not then absorbed into the community would not, acquisition of citizenship apart, become absorbed unless between then and the coming into force of the 1984 amendments to the Citizenship Act, they completed a period of permanent residence of ten years, disregarding periods of confinement in prison: s. 14A. Even allowing, however, that such changes may have taken place, that says nothing of the position of persons who were absorbed into the community prior to the coming into operation of s. 12 of the Migration Act. A law providing for the deportation of such persons cannot, in my view, be supported as a valid exercise of the power to legislate with respect to immigration. Although it is beyond question that Parliament has power to pass retroactive legislation (see R. v. Kidman [25] ; Millner v. Raith [26] ), it cannot make such laws operate over persons who are beyond the range of that power prior to the enactment of the retroactive law because, as Starke J. stated in relation to the immigration power in Ex parte Walsh [20] , "[t]he law is not then a law with respect to immigration, but a law for bringing again within the field of immigration persons who have passed, and were allowed by law to pass, beyond its borders".
1. (1908) 7 C.L.R. 277, at p. 308.
2. (1925) 37 C.L.R. 36, at pp. 62-65.
3. (1925) 37 C.L.R., at pp. 109-110.
4. (1925) 37 C.L.R., at p. 137.
5. (1949) 80 C.L.R. 533, at pp. 576-577.
6. (1949) 80 C.L.R., at pp. 587-588.
7. (1975) 133 C.L.R. 369, at p. 373.
8. (1975) 133 C.L.R., at p. 383.
9. (1975) 133 C.L.R. 369, at p. 373.
10. (1915) 20 C.L.R. 425.
11. (1942) 66 C.L.R. 1.
12. (1925) 37 C.L.R., at p. 137.