constitute a bar to his assimilation at the end of the five
year period. The probationary period having been survived
without liability to be deported, it became, so the argument
proceeded, a question of fact whether, in all the
circumstances including the circumstance that he had
committed a relevant offence, the appellant remained, at the
time of his conviction, an immigrant for the purposes of
s.13. That question of fact was, so it was said, plainly a
threshold question which had been ignored both by the
Minister and before the Tribunal. For his part, the
respondent Minister did not deny that, if the commission of
the offence did not in itself constitute a statutory bar to
the appellant's assimilation, the question whether the
appellant had ceased to be an immigrant was a necessary
threshold question which had been ignored. The argument
propounded, on the Minister's behalf, was that the commission
of the offence within the period of five years constituted,
for so long as conviction remained possible, an
insurmountable impediment or bar to the appellant's becoming
established as a member of the Australian community and, that
being so, the question whether the appellant had shed his
ummigrant status was foreclosed against him. On this
approach, to take an extreme example, larceny of a piece of
fruit, if theoretically punishable by imprisonment for one
year or more, would for so long as conviction remained
possible (which could be for the balance of a lifetime)