Making the best interests of the child a substantive human right at the centre of national level expulsion decisions

2.1. The best interests of the child in the ECtHR jurisprudence and UK case law

The best interests of the child have been recognised by the ECtHR as an essential part of the Article 8 ECHR balancing exercise, despite the fact that the ECHR ‘contains no formula referring to the child’s best interests’. ⁴ In the 2006 case of Üner, ⁵ the ECtHR found that one of the criteria for determining Article 8 ECHR claims in deportation cases was:

the best interests and well-being of the children, in particular the seriousness of the difficulties which any children of the applicant are likely to encounter in the country to which the applicant is to be expelled. ⁶

In UK domestic law, a dualist legal system, the ECHR has effect through the Human Rights Act 1998. The decisions of public authorities – such as expulsion decisions – are unlawful if they are incompatible with a Convention right. ¹¹ UK courts must ‘take into account’ the judgments of the ECtHR when determining human rights questions. ¹² Article 3 UNCRC has not been directly incorporated into legislation. However, in the immigration sphere, the Home Secretary is directed by Section 55 of the Borders, Citizenship and Immigration Act 2009 (BCIA) to discharge her immigration powers, ‘having regard to the need to safeguard and promote the welfare of children’. ¹³ This has been closely associated with Article 3 UNCRC. The Supreme Court has found that Article 3 UNCRC, ‘is a binding obligation in international law, and the spirit, if not the precise language, has also been translated into our national law’. ¹⁴ The Upper Tribunal (Immigration and Asylum Chamber) found that ‘While section 55 and Article 3(1) of the UNCRC are couched in different terms, there may not be any major difference between them in substance, as the decided cases have shown’. ¹⁵

By taking into account the ECtHR’s Article 8 ECHR judgments, including those incorporating the best interests of the child, UK law also treats the best interests of the child as part of the Article 8 ECHR balancing exercise: indeed the UK Supreme Court has found that ‘The best interests of a child are an integral part of the proportionality assessment under article 8 ECHR’. ¹⁶ More so, it has also found that the best interests of the child is supposed to be ‘a primary consideration’ ¹⁷ within ‘the assessment of proportionality under article 8(2) [ECHR]’. ¹⁸

2.2. Subject limitations on article 8 ECHR

The substantive content of Article 8 ECHR protected private and family life is an inadequate proxy for the range of factors covered by the best interests of the child. There is academic debate as to what the ECtHR means when it refers to the best interests of the child because it ‘has not arrived at a well-defined formula for the “best interest of the child” principle’. ¹⁹ Smyth offers one possible analysis:

In both first-entry and expulsion cases, the Court generally considers the following factors in evaluating, expressly or impliedly, whether the impugned measure would be contrary to the best interests of the child: the extent of the child or children’s ties with the country of origin and the host country; the ages of the child or children involved; and the existence of an effective family bond. However […] the issue of country ties is generally reduced to a question of adaptability. ²⁰

That is not to say that there is agreement as to what is definitively required by Article 3 UNCRC. ²¹ There are a number of competing checklists of factors that are argued to reflect what the best interests of the child requires of decision-makers. For example, lists have been developed by the Committee on the Rights of the Child General Comment 14, ²² the UNHCR Guidelines on Determining the Best Interests of the Child for unaccompanied and separated refugee children, ²³ and in academic writing by Margrite Kalverboer and colleagues. ²⁴ In UK family law, there is a legislative checklist – a ‘welfare checklist’ ²⁵ – in Section 1(2) of the Children Act 1989. Each checklist includes and excludes different individual factors, but they all contain a shared nucleus of concern for the child’s physical, emotional, and material needs, and support for the child’s development. In addition, each checklist introduces factors for consideration which are considerably more diverse than those factors associated with Article 8 ECHR family and private life. As one example, Kalverboer et al argue the following list of factors comprises the best interests of the child:

The child’s views;

Some of these aspects of the best interests of the child – such as the consideration of the child’s religious belief, and the provision of a safe physical environment – sit uncomfortably within even the broadest account of the Article 8 EHCR right to private life: ‘to ensure the development, without outside interference, of the personality of each individual with other human beings’. ²⁷ Instead, these considerations seem to be part of the freedom of religion under Article 9 and the Article 3 ECHR freedom from inhuman and degrading treatment, respectively. Placing these within the right to private life risks turning Article 8 ECHR into a catch-all with no apparent definitional limits.

This problem of making Article 8 ECHR a definitional catch-all to accommodate the expansive notion of the best interests of the child is even more acute with respect to the provision of the right to education and health. ²⁸ These rights are either absent from the ECHR (health) or explicitly listed elsewhere in the ECHR (the right to education in Article 2 of the First Protocol).

Taking full account of what the best interests of the child means therefore presents the ECtHR with a doctrinal conundrum. The ECtHR’s doctrine is that it will not create new rights which do not appear in the text of the Convention. ²⁹ Similarly, it will not give effect to a substantive right through the application of another. For example, in Maaouia v France the ECtHR determined that the expulsion of aliens is not covered by the Article 6 ECHR fair hearing guarantees because the creation of specific procedural guarantees against expulsion in Article 1, Protocol 7 ‘clearly intimated [the] intention not to include such proceedings within the scope of Article 6(1) of the Convention’. ³⁰ If the ECtHR were to maintain consistency in its doctrine on these points, it cannot fully reflect the right to health (a new right) or the right to education (a Protocol right) within its Article 8 ECHR determinations. However, both health and education are integral aspects of the UN Committee’s conception of the best interests of the child.

Incorporating the substantive aspects of the best interests of the child into the Article 8 ECHR determination presents two unappealing options. The first is to abandon definitional boundaries for Article 8 ECHR, risking the loss of internal coherence. The second is to limit the factors that the ECtHR is willing to consider under the auspices of the best interests of the child. In so doing, the transformational scope of the best interests of the child is considerably curtailed.

2.3. Placing the best interests of the child into the balance

The Üner ³¹ criteria seek to impose a checklist of factors to guide decision-makers as to the content of Article 8 ECHR family life. However, the articulation of the Üner criteria as a linear checklist is problematic. As the dissent to the Üner judgment observed:

[…] apart from the seriousness of the offence, all the “[Üner] criteria” seem to us to point to a violation of Article 8. […] Hence, the only way in which the finding of a non-violation can possibly be justified, when the “[Üner] criteria” […] are applied, is by lending added weight to the nature and seriousness of the crime. ³²

As well as the issue of content, the multitude of Üner criteria causes problems of weight and priority which the ECtHR does not address directly in the Üner judgment, nor its subsequent case law. The joint dissent in Üner asks rhetorically:

[…] how do we assign relative weight to the various factors on the basis of some ten guiding principles – are we not seeing here the implicit emergence of a method which gives priority to one criterion, relating to the offence, and treats the others as secondary or marginal? ³⁴

Leloup ³⁹ argues for ‘procedural rationality’ as a means of correcting the case-by-case inconsistencies in the ECtHR case law:

This sort of review implies that the Court takes the quality of the decision-making process at the legislative, the administrative and the judicial stage as decisive factors for assessing whether government interference in human rights was proportional. ⁴⁰

The Netherlands’ Ombudsman for Children recommendeds that children should have an ‘independent position’ in immigration decisions, as ‘Children have the right that their interests are assessed systematically and substantively on their own merits’. ⁴⁴ However, it is unclear as to whether what is being recommended here is the best interests of the child be considered to be an independent, substantive human right as suggested by this article, or merely an independently assessed criterion within the overall decision taken about the family as a unit. The latter seems more likely, as the Ombudsman’s report only appears to critique the absence of the best interests of the child as a constituent ‘criterion’ within the wider decision about the family unit:

[Children] only have a secondary importance, which means that they only get a residence permit if the parents get it. The interests of the child are not tested independently from the parents and do not constitute an independent criterion. ⁴⁵

It can be argued that the ECtHR cannot treat the best interests of the child as a substantive right because there is no textual authority in the ECHR. This is a forceful point. However, this article is not addressed to the ECtHR directly. Instead, it is domestic legal systems which must give full effect to Article 3 UNCRC as a substantive right.

3.1. Are the best interests of the child engaged?

The first relevant question is to establish that the best interests of the child are engaged by an expulsion decision. Children are affected by an expulsion decision when it is taken against them personally, but they may also be affected in circumstances where their parent(s) face expulsion. There appears little reason to depart from the ECtHR practice of assuming that family life exists between biological parents and children, and conducting a short enquiry as to whether there are sufficient de facto ties – emotional, financial, residential etc – to amount to family life in step- and social-parental relationships. ⁴⁸ However, the necessity of ties between parent and child in order to engage the child’s human right to their best interests suggests that children would not always have a best interests right which is engaged. The immigration removal of a parent is unlikely to impact on the best interests of a child where there is an absence of ties, for example, where contact between the parent and child is prohibited with no prospect of being permitted in the future. ⁴⁹

Once the best interests of the child is engaged, it is necessary to consider what is in the best interests of the child. It should not be assumed that it is in the best interests of all children to remain in the deporting country. The child may be a recent arrival with limited ties to the deporting state, but with de jure and de facto ties to the receiving state. The challenge is to determine what is in fact in the child’s best interests. In section 2.2., above, it is argued that the best interests of the child is a much broader concept than the Article 8 ECHR right to private and family life, as interpreted by the ECtHR. Although the ECtHR’s principles include concern for the best interests of the child, the ECtHR’s jurisprudence falls short of the holistic assessment of the child’s interests envisaged by the Committee on the Rights of the Child.

There are examples of best interests checklists in UK family law (s1(3) Children Act 1989), the Committee on the Rights of the Child General Comment 14 on the right of the child to have his or her best interests taken as a primary consideration, ⁵⁰ and in the BIC-Model, created by academic Margrite Kalverboer and colleagues. ⁵¹ The Committee on the Rights of the Child also argues that the best interests of the child is context specific and a ‘dynamic’ ⁵² principle and there may be need to create a new, context specific checklist.

What is most significant for this though experiment, however, is not how the best interests of the child ought to be determined, for that is a separate academic question. Of most significance is that on this account the best interests of the child operates independently of any Article 8 ECHR determination, rather than be accommodated within Article 8 ECHR to create a single decision-making process. However, putting the best interests of the child at the centre does not extinguish the Article 8 ECHR family life claims of any other person: human rights is not a zero-sum game. Instead, the right to family life must also be determined, but as a separate and independent human right. After determining whether or not expulsion is a disproportionate interference with the best interests of the child, the decision-maker would then turn to whether or not deportation is a disproportionate interference with the right to family life, particularly with the family life right of the child’s parents. Considering Article 3 UNCRC and Article 8 ECHR as independent human rights sequentially may result in one of the following outcomes:

Violation of Article 3 UNCRC and Article 8 ECHR

Outcomes 1, 2, and 3 would result in removal being prohibited on human rights grounds because it would result in a human rights breach of an individual and therefore should not take place. Any examples of each possible outcome based on fact patterns in existing case law must be necessarily imprecise and speculative, but there are some useful parallels.

Outcome 1 arises in situations where the expulsion of a foreign national violates the rights of everyone involved. For example, in Omojudi, ⁵³ the expulsion of the applicant also violated the family life rights of those with whom he was connected to. He had a wife and he assisted with the care of their British citizen children (some were minors, some were young adults still living at home). He also had family life with British citizen grandchildren who lived with the applicant in a multi-generational household. Expulsion of the applicant would not just negatively impact on his family life, but his removal from this complex web would impact directly on the family life of his family members who relied on his emotional and financial support. ⁵⁴

Outcome 2 would arise in fact patterns similar to that of Udeh ⁵⁵ or Onur ⁵⁶ where the father (who was to be deported), had a parental relationship with their child (who was a national of the deporting state), but did not have a relationship with the child’s mother. Although the fact pattern of these cases was very similar, an Article 8 ECHR breach was found in Udeh but not in Onur, emphasising the case-by-case lottery that exists in this area.

Outcome 3 could occur, for example, in situations where the foreign national has minimal contact with a non-resident child from a past relationship, but has a strong family life relationship with a current spouse. In such circumstances the Article 8 ECHR family life with the spouse may prevail over the public interest in expulsion, even when the best interests of the child may be outweighed. Alternatively, as in AW Khan, the applicant had very limited contact with a recently born British citizen child, ⁵⁷ so the best interests of the child under Article 3 UNCRC is unlikely to demand the applicant’s expulsion be halted. In contrast, the applicant’s Article 8 ECHR private life was found to be violated due to the ‘strength of ties with the UK’, lack of ties with Pakistan, the length of his residence in the UK, and the young age at which he entered the UK. ⁵⁸ In outcome 4, either the rights are not engaged at all, or the public interest in expulsion outweighs the rights (or either in combination).

The application of multiple human rights to the same factual situation, and their sequential consideration as equally important but separate human rights, is an everyday aspect of human rights adjudication. Two further expulsion cases emphasise this point. In Paposhvili, the applicant was a Georgian national resident in Belgium and who had been convicted of a number of criminal offences. He argued before the ECtHR that his deportation to Georgia would be a violation of Article 3 ECHR because of the lack of appropriate treatment there for his leukaemia and, consequently, his life expectancy would be considerably reduced by his deportation. ⁵⁹ Furthermore, he argued that his deportation would be a breach of his Article 8 ECHR family life rights as it would entail his separation from his family who had Belgian residency papers. ⁶⁰ In the second case, of Mubilanzila Mayeka & Kaniki Mitunga, a child (Mitunga) arrived in Belgium where she was sent to stay with an uncle and grandmother after her mother (Mayeka) had obtained refugee status in Canada. ⁶¹ Not realising that Mitunga had not automatically also been given refugee status by the Canadian authorities, ⁶² Mitunga arrived in Belgium without the necessary immigration documentation. ⁶³ The Belgian authorities removed Mitunga unaccompanied to the DRC, her country of nationality, where there was no reception arrangements in place to ensure her safe arrival and future care. ⁶⁴

In both cases, a violation of Article 3 ECHR and Article 8 ECHR was found by the ECtHR. The findings were not of a violation of Article 3 in conjunction with Article 8, but of two separate human rights arising from the single action by the State. Successfully showing a violation of either right would have been sufficient to prevent the expulsion. ⁶⁵ In neither case was there any question that a finding of non-violation of either right could possibly result in the removal being found to be permitted. Once an action of the State is shown to be a violation of any human right then the action is unlawful, no matter how many human rights are engaged and how many are actually found to be violated.

The first stage of any human rights enquiry is whether or not the human right is actually engaged. The expulsion of a parent or a child will not always interfere with the best interests of the child; sometimes the expulsion of a parent will have no effect on their child if family ties have been effectively severed, and sometimes it will not be in the best interests of the child to remain in the deporting State. In any event, the significant aspect of treating the best interests of the child as a human right is that the decision-maker must engage with an assessment of the child’s whole life interests, rather than just with those interests covered under the rights to family and private life. The further doctrinal significance is that it resolves the proper relationship between the best interests of the child as an independent factor, the child’s Article 8 ECHR family life, and the Article 8 ECHR rights of their parents.

3.2. Would the interference with the best interests of the child by the immigration decision secure a legitimate aim?

The most difficult aspect of the best interests of the child as a substantive human right is that there is not a set of legitimate aims inscribed in the text. This is in contrast to those rights in the ECHR which are recognised to be ‘qualified’ (Articles 8-11 ECHR), and similarly framed UNCRC rights (Articles 13-15 UNCRC). These limitation clauses permit qualified rights to be balanced against interests held by the community as a whole, such as: public safety, order, health, or morals. However, the absence of an express limitation clause does not mean that the best interests of the child is an absolute human right. Article 3 UNCRC envisages the best interests of the child being a ‘primary consideration’, which implies that other considerations are relevant in decisions regarding a child. The question is therefore what those other considerations might be. There are two possible answers. The first is that only the rights and freedoms of others are permitted to be balanced against the best interests of the child. The second is to imply community interests as legitimate aims might be balanced against the best interests of the child.

That the best interests of the child as a substantive human right may only be limited by the human rights of others is textually supported by Article 3 UNCRC itself. Article 3 UNCRC has no limitation clause attached, and the existence of limitation clauses to Articles 13-15 UNCRC suggests that there is a substantive doctrinal difference between them. However, if the best interests of the child are not to be an absolute right, then there must be something which might be balanced against them. The only thing of equal status to a human right is another human right. This logic can be observed in UNICEF’s Implementation Handbook which recognises only ‘human rights interests’ ⁶⁶ which might compete or conflict with the primacy of the best interests of the child. It can also be observed in the Committee on the Rights of the Child guidance that unaccompanied asylum seeking children may be returned to their country of nationality even when it is not in their best interest to do so, but only so long as such a decision is taken:

[…] after careful balancing of the child’s best interests and other considerations, if the latter are rights-based and override best interests of the child. Such may be the case in situations in which the child constitutes a serious risk to the security of the State or to the society. Non-rights-based arguments such as those relating to general migration control, cannot override best interests considerations. ⁶⁷

If only the human rights of others may be balanced against the best interests of the child in expulsion decisions, then the assessment must be a forward-looking, future oriented one. Deportation cannot protect against a human rights interference by a foreign national offender which occurred in the past, because it has already happened. Expulsion can, however, contribute to the prevention of a human rights breach in the future. There must therefore be a risk of such an occurrence for there to be a legitimate rights-based justification for interfering with the best interests of the child. Deportation of non-EEA national offenders from the UK is currently justified on the basis of ‘avoiding the risk of reoffending, deterrence and public revulsion’. ⁷⁰ However, deterrence and public revulsion are not forward looking factors as they are based solely on the fact that offending has occurred in the past, and apply regardless of whether or not the foreign national offender presents a risk of interfering with the human rights of another person in the future.

For expulsion cases based on the deportation of a foreign national offender for criminal offences committed in the UK, treating the best interests of the child as a human right in this way would not be as radically different from the current norm as might be expected. General deterrence and public revulsion cannot be used to justify the deportation of an EAA-national offender from the UK. Instead, the decision to deport an EAA-national:

[…] must be based exclusively on the personal conduct of the person concerned and that matters that do not directly relate to the particular case or which relate to considerations of general prevention do not justify a decision to remove him. On the face of it, therefore, deterrence, in the sense of measures designed to deter others from committing similar offences, has of itself no part to play in a decision to remove the individual offender. Similarly, it is difficult to see how a desire to reflect public revulsion at the particular offence can properly have any part to play. ⁷¹

The biggest impact would be on the expulsion of a foreign national for administrative breaches of immigration regulations. Rather than expulsion for reasons of criminal offending, the reasons for immigration removal from the UK are said to be because an individual does not possess leave to enter or remain. ⁷³ This do not appear to be human rights-based considerations because a failure to have an administrative immigration status does not obviously interfere with a human right possessed by another individual or group. However, the general grounds for refusal of immigration leave do permit the refusal of immigration leave because of:

[…] the undesirability of permitting the person concerned to remain in the United Kingdom in the light of his conduct […], character or associations or the fact that he represents a threat to national security. ⁷⁴

The second possible approach would be to imply public interest, legitimate aims against which the best interests of the child could be balanced. However, the existence of textually limited legitimate aims is important. In the ECHR context (and there is no reason to believe that it should not also apply to qualified rights in the UNCRC), the legitimate aims are generally co-identified with the public interest, ⁷⁶ but they are also exhaustive of which kinds of community interests might lawfully be balanced against the human right at stake. ⁷⁷ This means that policies which may be considered by a government or the electorate to be in the public interest but are not encompassed within the express legitimate aims, would always be a violation of the right. Such would be the case, for example, if immigration policy was explicitly justified on the basis of maintaining an ethnically homogenous society. Permitting any public interest to be considered by the decision-maker is an instinct in some of the literature on human rights proportionality, but is forcefully challenged elsewhere:

The decision to include all interests makes no room for the assertion that some interests are ill-founded or worthless or vicious or inhuman or irrelevant. It does not allow one to deny that every interest counts, every claim should be valued, every argument weighed; it makes no room for the assertion “your interest does not count,” “your claim is valueless,” “your argument is weightless”. ⁷⁸

To pursue immigration control for the sake of immigration control is not a legitimate aim. In Chickwamba, the House of Lords found that there must be rational reasons for enforcing a requirement that a person should apply for immigration leave from abroad, when they are already (lawfully or unlawfully) in the UK. Immigration control for the sake of immigration control was not an adequately rational reason. ⁸² Immigration control policies are based on a mixture of economic interests (for example, work and tourism visas), cultural interests (for example, spousal visas), and humanitarian interests (for example, refugee laws). Where the best interests of the child is considered to be a human right, the State must adequately account for how its immigration control policies pursues the public interest: including the idea that protecting the wellbeing and development of children is in itself a public interest good.

3.3. The tests of rationality and necessity

Requiring the State to account for how its immigration control policies pursues the public interest is an important precursor to the tests in human rights methodology of rationality and necessity. The test of rationality, ‘requires that the limitation contribute to the achievement of a legitimate end’. ⁸³ The test of necessity requires ⁸⁴ that the action be the ‘least restrictive means to further that end’. ⁸⁵ Treating the best interests of the child as a human right demands that decision-makers must interrogate whether the legitimate aim (be it based on human rights or on some public interest) rationally applies in the individual case, and whether removal or deportation is necessary. This is in part why treating the best interests of the child as the substantive human right at stake is important.

The rationality of an immigration decision must be considered. An obviously irrational immigration decision is one which cannot lead to the enforced immigration removal or deportation because the person is de jure or de facto stateless. ⁸⁶ Irrationality might arise in individual decisions where the decision-making process is irrational. ⁸⁷ Other cases of irrationality will arise where the rationale for immigration policies are undercut. For example, the UK’s Home Office used powers to deny continued immigration leave to individuals who made dishonest tax returns, but in cases of innocent mistake and where amendment was permitted by accountancy law. ⁸⁸ Such cases were not rational in human rights terms because they did not rationally contribute to the legitimate aim of preventing fraudulent visa applications.

The question of necessity seeks the ‘least restrictive means’ ⁸⁹ of securing the legitimate aim and thus requires the State to show that there was not a less invasive action that would have achieved the same goals, but without interfering with individual human rights to the same extent. With respect to the deportation of foreign national offenders, the test of necessity requires careful consideration of various post-sentence devices to prevent reoffending. If any of these other measures are likely to be effective in preventing crime and disorder by a foreign national offender – a legitimate public interest goal – then deportation is not necessary and therefore constitutes a violation of the child’s best interests as a human right.

Post-sentence measures take a variety of forms in different countries. In the UK, the law does not require the permanent incapacitation of UK national offenders beyond the length of their prison sentence. Indeed, the indeterminate prison sentence was abolished in 2012. ⁹⁰ Instead, some level of risk of reoffending is accepted as a consequence of an offender being released back into the community. That risk is managed by post-sentence measures. For those sentenced to less than two years imprisonment a mandatory period of post-sentence supervision now applies ⁹¹ so that all offenders must spend twelve months under the care of the probation service, either on licence or under supervision. ⁹² The stated rationale for post-sentence supervision is the effective rehabilitation of offenders. ⁹³ Other post-conviction measures in use in the UK include Sexual Harm Prevention Orders ⁹⁴ which apply to sex offenders and those deemed to be future potential sex offenders. ⁹⁵ Criminal Behaviour Orders ⁹⁶ may be imposed after conviction of an offence if ‘the offender has engaged in behaviour that caused or was likely to cause harassment, alarm or distress to any person’. ⁹⁷ Mere suspicion of terrorism can result in the imposition of a Terrorism Prevention and Investigation Measures. ⁹⁸ In the case of domestic violence, Non-Molestation Orders have been around in one form or another since 1976. ⁹⁹

A separate investigation is required to provide empirical or theoretical justification of any particular measure(s). Here it is sufficient to observe that there is a range of post-sentence measures which are currently in widespread use in order to prevent reoffending, and thereby are a potentially less restrictive means of pursuing the public interest in preventing crime and disorder. There is also no reason to believe that such measures are effective for a State’s citizen offenders, but ineffective when applied to foreign national offenders.

Applying the tests of necessity and rationality to the best interests of the child as a human right is important in order to address what Dembour critiqued as the problematic logical inversion in the ECtHR’s jurisprudence which put the State’s interest in immigration control at the centre of the human rights enquiry. ¹⁰⁰ When the best interests of the child is required to dislodge the presumption in favour of State sovereignty, then the tests of necessity and rationality are clearly met; cancelling immigration removal of a parent is axiomatically a rational and necessary response to protecting the best interests of the child, and the question is reduced to one of balancing the interests of child and State. In contrast, when the State’s interest must dislodge a presumption in favour of the human right, the tests of necessity and rationality present more serious hurdles which the State must overcome in order to justify its interference with the best interests of the child. Importantly, the tests of rationality and necessity might find the State in violation of the best interests of the child before the balancing stage of human rights review.

3.4. Is the interference with the best interests of the child strictly proportionate to the pursuance of the legitimate aim?

The final test in human rights methodology is that of balancing. State actions might be rational and the least restrictive means, but there must still be a strict proportionality between the importance of what is being sought to be achieved and the human rights interference. How decision-makers might come to a decision as to the balance between a human right and an interference is by no means settled in the academic literature or judicial decisions. ¹⁰¹ After all, the idea of the merchant’s balance is only a metaphor, ¹⁰² one that is capable of accommodating multiple formal decision-making processes.

It is in the balancing stage that the idea of the best interests of the child as a ‘primary consideration’ – as textually required by Article 3 UNCRC – makes most sense. For this we can turn to Alexy’s breakdown of the different elements which go into the balancing exercise. Regardless of the advantages and disadvantages which might be attributed to Alexy’s system, rationalising the different elements permits us to consider independently the different factors that impact on a balancing decision. ¹⁰³ Alexy suggests that there are three core ingredients in the balancing of constitutional or human rights: (1) the intensity of the interference with the right and the importance of satisfying the public interest in the individual case, (2) the ‘reliability of the empirical assumptions’ applied in the case, and (3) the abstract weight of the principles or rights at stake. ¹⁰⁴ The primacy of the best interests of the child is relevant to the abstract weight.

The abstract weight is the weight a human right has, independent of the individual case. ¹⁰⁵ This means that one type of human right may have a greater abstract weight than others. ¹⁰⁶ For example, with respect to freedom of expression under Article 10 ECHR, the ECtHR frequently grants a greater intrinsic weight to certain forms of expression (for instance, political opinion or reportage) than to others (for example, entertainment or art), ¹⁰⁷ and a greater intrinsic weight to expressions which contain criticism of government than of private individuals. ¹⁰⁸ This does not mean that political expressions that critique the government are inviolable – the intensity of the interference might be light and the importance of satisfying the public interest great – but the granting of greater abstract weight means that the competing public interest must be even stronger in the specific case in order to displace the right.

If the best interests of the child are to be treated as being ‘primary’, the decision-maker must not ‘treat any other consideration as inherently more significant than the best interests of the children’. ¹⁰⁹ If the best interests of the child are a primary rather than paramount consideration it makes sense for it to carry more, or as much, abstract weight into the balancing exercise as the public interest in expulsion (whatever that public interest might be). The intensity of the interference with the best interests of the child varies in individual cases depending on the age of the child, their length of residency, nationality (and so on), but the abstract weight of the best interests of the child remains the same as between cases. To give the best interests of the child less abstract weight than any other human right consideration or public interest will mean that it no longer has primary status.

As to determining the intensity of interference with the best interests of the child, this article has previously noted that different checklists of factors already exist to help decision-makers: for example, s1(2) Children Act 1989, General Comment 14, ¹¹⁰ and the BIC-Model. ¹¹¹ This article is not concerned with defining and defending a particular checklist for determining the best interests of the child because, although it is an important enquiry, it is one which is logically separate from how the best interests of the child ought to be treated within the wider decision-making process in deportation cases.