Chapter III Constraints
58 It is a fundamental principle of the Australian Constitution, flowing from Chapter III, that the adjudication and punishment of criminal guilt for offences against a law of the Commonwealth is exclusively within the province of courts exercising the judicial power of the Commonwealth. However, the authorities have consistently rejected suggestions that the detention of an alien for the purposes of deportation infringes that principle. In Ex Parte Walsh and Johnson; In re Yates (1925) 37 CLR 36, at 95-96, Isaacs J distinguished between deportation as a 'punishment for crime' (which Chapter III of the Constitution would require to be entrusted to a court) and deportation 'as a political precaution'. See, too, at 60-61, per Knox CJ; at 132-133, per Starke J. In O'Keefe v Calwell (1949) 77 CLR 261, Latham CJ, in a frequently cited passage, said this (at 278):
'Deportation is not necessarily punishment for an offence. The Government of a country may prevent aliens entering, or may deport aliens… Exclusion in such a case is not a punishment for any offence. Neither is deportation… The deportation of an unwanted immigrant (who could have been excluded altogether without any infringement of right) is an act of the same character: it is a measure of protection of the community from undesired infiltration and is not punishment for an offence…'
59 In Minister for Immigration and Ethnic Affairs v Pochi (1980) 31 ALR 666, a Full Court was concerned with s 12 of the Migration Act, a forerunner to s 501(2). Smithers J observed (at 668-669) that the statutory objectives underlying s 12 were
'connected with the maintenance of standards of the Australian population by deporting aliens whose deportation was seen by the Minister to be desirable in the best interests of Australia. Without doubt the statutory objectives include protecting the Australian community from persons in respect of whom it is reasonable to think that their future conduct may be detrimental to the Australian community'.
Deane J, with whom Evatt J agreed, said this (at 685):
'If the slate were clean, I should have thought that there was a great deal to be said for the view that the banishment, consequent upon his conviction of a criminal offence, of one who has become an accepted member of the Australian community was an interference with personal liberty by way of punishment… If that view were correct, a question would arise as to whether a provision purporting to confer upon an executive officer of the Commonwealth a power as close to the heart of judicial power as the subjection of the individual to interference with personal liberty by way of punishment was consistent with the provisions of Chapter III of the Constitution. It has however been said, in many cases, that deportation cannot properly be regarded as punishment of an offence… The validity of legislation entrusting to executive officers and organs, decisions as to the deportation of established residents has long been accepted.' (Emphasis added.)
60 In Chu Kheng Lim, the Court upheld the constitutional validity of legislation providing for the detention of non-citizens arriving unlawfully in Australia by boat, although a majority struck down s 54R of the Migration Act which prohibited a court ordering the release of such persons. The joint judgment of Brennan, Deane and Dawson JJ (with which Mason CJ and Gaudron J relevantly agreed), addressed the application of Chapter III of the Constitution to the deportation of non-citizens. Their Honours pointed out (at 27) that:
'There are some functions which, by reason of their nature or because of historical considerations, have become established as essentially and exclusively judicial in character. The most important of them is the adjudgment and punishment of criminal guilt under a law of the Commonwealth. That function appertains exclusively to and "could not be excluded from" the judicial power of the Commonwealth. That being so, Ch III of the Constitution precludes the enactment, in purported pursuance of any of the sub-sections of s 51 of the Constitution, of any law purporting to vest any part of that function in the Commonwealth Executive.
In exclusively entrusting to the courts designated by Ch III the function of the adjudgment and punishment of criminal guilt under a law of the Commonwealth, the Constitution's concern is with substance and not mere form. It would, for example, be beyond the legislative power of the Parliament to invest the Executive with an arbitrary power to detain citizens in custody notwithstanding that the power was conferred in terms which sought to divorce such detention in custody from both punishment and criminal guilt. The reason why that is so is that, putting to one side [certain] exceptional cases to… the involuntary detention of a citizen in custody by the State is penal or punitive in character and, under our system of government, exists only as an incident of the exclusively judicial function of adjudging and punishing criminal guilt.'
61 The joint judgment observed (at 28-29) that a provision purporting to authorise the detention of citizens, otherwise than by a court in the exercise of the judicial power of the Commonwealth, would be beyond the legislative competence of the Parliament and invalid. The question to be considered was whether the fact that the legislation was confined to non-citizens avoided any conflict with Chapter III of the Constitution.
62 Their Honours said (at 29) that the most important difference between a citizen and non-citizen lies 'in the vulnerability of the alien to exclusion or deportation'. The effect of this vulnerability
'is significantly to diminish the protection which Ch III of the Constitution provides, in the case of a citizen against imprisonment otherwise than pursuant to judicial process'.
After referring to the broad scope of the aliens power, their Honours said this (at 32):
'It can therefore be said that the legislative power conferred by s 51(xix) of the Constitution encompasses the conferral upon the Executive of authority to detain (or to direct the detention of) an alien in custody for the purposes of expulsion or deportation. Such authority to detain an alien in custody, when conferred upon the Executive in the context and for the purposes of an executive power of deportation or expulsion, constitutes an incident of that executive power. By analogy, authority to detain an alien in custody, when conferred in the context and for the purposes of executive powers to receive, investigate and determine an application by that alien for an entry permit and (after determination) to admit or deport, constitutes an incident of those executive powers. Such limited authority to detain an alien in custody can be conferred on the Executive without infringement of Ch III's exclusive vesting of the judicial power of the Commonwealth in the courts which it designates. The reason why that is so is that, to that limited extent, authority to detain in custody is neither punitive in nature nor part of the judicial power of the Commonwealth. When conferred upon the Executive, it takes its character from the executive powers to exclude, admit and deport of which it is an incident.' (Citation omitted. Emphasis added.)
63 McHugh J observed (at 71) that the legislation under challenge did not impose a punishment or penalty 'in its ordinary operation':
'Although detention under a law of the Parliament is ordinarily characterized as punitive in character, it cannot be so characterized if the purpose of the imprisonment is to achieve some legitimate non-punitive object. Thus…imprisonment of a person who is the subject of a deportation order is not ordinarily punitive in nature because the purpose of the imprisonment is to ensure that the deportee is excluded from the community pending his or her removal from the country… But if imprisonment goes beyond what is reasonably necessary to achieve the non-punitive object, it will be regarded as punitive in character.'
64 In NAMU of 2002 v Minister for Immigration and Multicultural and Indigenous Affairs (2002) 124 FCR 589, reliance was placed on McHugh J's observations to support a submission attacking the validity of s 196(1) of the Migration Act, which required an unlawful non-citizen to be detained pending removal or deportation. The Full Court rejected the attack. Their Honours said this (at 597):
'The factual consequences of immigration detention for the mental health of an individual detainee cannot, in our view, render s 196(1) invalid on the ground that those consequences evince an intention to detain for the purpose of punishing those who are detained. Despite the effect that detention may have on the mental health of the detained child appellants, the non-punitive purpose of detention pursuant to s 196(1) is not displaced by that effect. If a punitive purpose is to be found, it must be discovered from the legislative structure of the regime for detention rather than from the consequences of the detention on individual detainees.'
65 These authorities do not rule out the possibility that in a particular case the decision-maker intends to punish the non-citizen for his or her criminal conduct, rather than to achieve an objective contemplated by the legislation. But in order to make out such a case it is necessary to adduce evidence of the decision-maker's actual purpose: cf Luu v Minister for Immigration and Multicultural Affairs (2002) 127 FCR 24, at 36.