Introduction
The conflict of laws, or private international law, is the body of rules that applies to legal disputes with a cross-border element. It is conventionally understood to revolve around three core questions: which court has the authority to hear the case (jurisdiction); which country's law should be applied to resolve the dispute (choice of law); and under what circumstances a judgment from a foreign court will be given effect (recognition and enforcement). While these three pillars form the essential framework of the subject, it is accurate to state that they are not its only concerns. The resolution of these primary questions often depends on a range of preliminary, procedural, and conceptual issues that are themselves significant areas of legal principle and debate. This essay will argue that the statement is correct by discussing several of these other fundamental concerns, including the determination of connecting factors like domicile, the process of characterisation, and the rules governing the proof and exclusion of foreign law. These issues demonstrate that the application of conflict of laws principles is a more complex process than the main tripartite structure might suggest.
The Importance of Connecting Factors
Before a court can even begin to address jurisdiction or choice of law, it must often establish a legally relevant connection between a person or an event and a particular legal system. These "connecting factors" are foundational concepts within private international law. The most significant of these in English law for matters of personal status are domicile and, increasingly, habitual residence.
Domicile is a legal concept used to link a person with a particular legal system for the purpose of determining their personal law, which governs matters such as marriage, succession, and legal capacity. Every individual must have a domicile, and only one, at all times (Udny v Udny, 1869). English law distinguishes between a domicile of origin, which is acquired at birth, a domicile of dependency, and a domicile of choice, which an adult with capacity can acquire by residing in a country with the intention of remaining there permanently or indefinitely (Fentiman, 2015). Determining a person's domicile can be a complex factual inquiry, as seen in cases like IRC v Bullock (1976), where the court had to analyse a man’s entire life history and stated intentions to decide if he had abandoned his English domicile of origin for a new domicile of choice in Canada. The difficulty and expense involved in proving the necessary intention for a change of domicile demonstrate that this is a significant concern in its own right, separate from the main choice of law rule it might trigger.
More recently, habitual residence has emerged as a key connecting factor, particularly in international conventions and EU regulations that remain part of retained EU law. For example, under the Hague Convention on the Civil Aspects of International Child Abduction 1980 (incorporated into English law by the Child Abduction and Custody Act 1985), the "habitual residence" of a child is the crucial factor for determining whether a child’s removal was wrongful. Unlike domicile, habitual residence is intended to be a question of fact, focusing on the centre of a person's life and a degree of settled purpose, rather than their long-term intentions (Re J (A Minor) (Abduction: Custody Rights), 1990). However, its definition remains a source of litigation, as seen in Re B (A Minor) (Abduction) (1993). Therefore, establishing these connecting factors is a critical preliminary stage in many conflict of laws cases, and the rules and case law surrounding them constitute a major area of concern for the subject.
The Process of Characterisation
Once a court has jurisdiction and a connecting factor has pointed to a particular legal system, another vital concern arises: characterisation (or classification). This is the process of assigning a particular legal issue to its correct legal category. This is important because different legal categories have different choice of law rules. For example, is the issue one of contract, tort, property, or procedure? The answer can determine which law applies and, therefore, the outcome of the case.
A classic and persistent problem of characterisation is the distinction between substance and procedure. It is a fundamental principle of private international law that the forum court (in this context, the English court) applies its own procedural rules (the lex fori), while applying the substantive law of the country identified by the relevant choice of law rule (the lex causae). However, the line between substance and procedure is not always clear, and different legal systems may categorise the same rule differently. English courts generally determine characterisation according to the lex fori (Fawcett et al., 2008). A key area of difficulty has been statutory limitation periods. Historically, English law treated most limitation periods as procedural, meaning the English time limit would apply regardless of the governing foreign law (Huber v Steiner, 1835). This could lead to a claim that was valid under its governing substantive law being dismissed in England. This position was widely criticised as unjust and has now been largely reversed by the Foreign Limitation Periods Act 1984, which provides that the limitation rules of the lex causae are to be applied as a matter of substance.
Despite this reform, the substance/procedure distinction remains a live issue, particularly regarding the quantification of damages. In Harding v Wealands (2006), the House of Lords had to decide whether a cap on damages under a New South Wales statute was a matter of substance (part of the law of the tort) or procedure (part of the court's assessment of remedies). The House of Lords held that the question of what type of loss is recoverable is substantive, but the quantification of that loss (how much money) is procedural and for the forum court. This decision shows that characterisation is not a simple mechanical exercise but a complex legal analysis that can have a profound impact on a claimant's award. It is therefore a central and ongoing concern of the conflict of laws.
The Exclusion of Foreign Law
A final area of concern is the set of principles that allow an English court to refuse to apply an otherwise applicable foreign law. Even if the choice of law rules clearly point to the law of another country, that law will not be applied if it falls foul of certain overriding principles of the lex fori. The most significant of these is the doctrine of public policy.
An English court will not enforce a foreign law or judgment that is contrary to the fundamental public policy of English law. This power is used sparingly to avoid undermining the certainty of choice of law rules. In Loucks v Standard Oil Co of New York (1918), Cardozo J famously stated that courts do not close their doors "unless help would violate some fundamental principle of justice, some prevalent conception of good morals, some deep-rooted tradition of the common weal". An example of its application in England is Oppenheimer v Cattermole (1976), where the House of Lords refused to recognise a Nazi decree that deprived German Jews of their nationality, viewing it as a gross violation of human rights. Similarly, foreign laws that are discriminatory on grounds of race or religion, or that seek to enforce contracts for slavery or prostitution, would be denied application on public policy grounds (Dicey, Morris & Collins, 2022).
Beyond public policy, English courts will also not enforce the penal or revenue laws of another state. A penal law is one that seeks to punish an offence against the state, while a revenue law is one concerning taxes and duties. The rule against enforcing foreign penal laws was affirmed in Huntington v Attrill (1893), and the rule against enforcing foreign tax laws was confirmed by the House of Lords in Government of India v Taylor (1955). These exclusionary rules act as a crucial ‘safety valve’, ensuring that the English legal system is not compelled to give effect to foreign laws that it considers abhorrent, or which fall within the sovereign domain of another state. This demonstrates that the conflict of laws is not just about a neutral application of rules, but also involves protecting the fundamental values of the forum.
Conclusion
In conclusion, while jurisdiction, choice of law, and the enforcement of foreign judgments are undoubtedly the central pillars of private international law, they do not represent the entirety of its concerns. The operation of this framework depends on a number of other complex and important legal doctrines. As has been discussed, the determination of connecting factors like domicile and habitual residence is a necessary preliminary step that is often contentious. The process of characterisation, particularly the difficult distinction between substance and procedure, is a vital conceptual stage that can dictate the outcome of a dispute. Finally, the ability of English courts to exclude foreign laws on grounds of public policy, or because they are penal or revenue laws, shows that the conflict of laws is also concerned with upholding the fundamental principles of the domestic legal system. These issues are not merely ancillary; they are integral to the machinery of private international law and constitute significant areas of legal concern in their own right. Therefore, the statement that the 'big three' are not the only concerns of the conflict of laws is demonstrably correct.
References
Dicey, Morris & Collins on the Conflict of Laws (16th edn, Sweet & Maxwell, 2022).
Fawcett, J.J., Carruthers, J.M. and North, P. (2008) Cheshire, North & Fawcett: Private International Law. 14th edn. Oxford: Oxford University Press.
Fentiman, R. (2015) International Commercial Litigation. 2nd edn. Oxford: Oxford University Press.
Cases
Government of India v Taylor [1955] AC 491
Harding v Wealands [2006] UKHL 32, [2007] 2 AC 1
Huber v Steiner (1835) 2 Bing NC 202
Huntington v Attrill [1893] AC 150
IRC v Bullock [1976] 1 WLR 1178
Loucks v Standard Oil Co of New York (1918) 224 NY 99
Oppenheimer v Cattermole [1976] AC 249
Re B (A Minor) (Abduction) [1993] 1 FLR 993
Re J (A Minor) (Abduction: Custody Rights) [1990] 2 AC 562
Udny v Udny (1869) LR 1 Sc & Div 441
Legislation
Child Abduction and Custody Act 1985
Foreign Limitation Periods Act 1984
