I. Introduction

Although this chapter addresses a somewhat colourful bundle of questions, all of them, one way or the other, relate to one overarching question: do specific European perspectives exist de lege lata—or at least should such perspectives exist de lege ferenda—when it comes to the law of state immunity in situations where serious violations of international law have been committed or where, more realistically in current circumstances, such violations are being alleged by the claimant? To get straight to the point, the blunt answer is a clear and simple ‘no’. There is no European Sonderweg (or ‘special way’) when it comes to the law of state immunity, and there ought not to be one either. Rather, member states of the EU, and contracting parties to the European Convention on Human Rights (ECHR) more broadly, should continue to abide by universally recognized principles of state immunity, as having been confirmed by the International Court of Justice (ICJ) in its Jurisdictional Immunities Judgment on the matter.Footnote 1 Accordingly, relevant treaty norms, including the ECHR and applicable secondary legislation of the EU,Footnote 2 should continue to be interpreted and applied in line with currently applicable norms of customary and treaty law on the matter.

Having thus set the scene for the perspective adopted in this chapter, the following sections will delve into more specific issues surrounding the topic. First, a somewhat technical aspect will be addressed: the enforcement, in individual European states, of domestic judgments rendered contrary to traditional concepts of state immunity (section II). In particular, the debate within the Hague Conference on Private International Law in the late 1990s will be summarized since it was also of relevance for the debate on the 2004 UN Convention on Jurisdictional Immunities of States and Their Property (UN Convention on State Immunity)Footnote 3 and the development of the Brussels Regulation. Second, the possible development of specific rules of regional customary law on the matter will be discussed (section III). Third, the legal implications of the jurisprudence of the Italian Constitutional Court (ItCC) for European military operations, and in particular for military operations under the auspices of the EU, will be analyzed (section IV). Finally, the chapter will conclude with some remarks on possible European perspectives beyond Sentenza 238/2014 (section V).

II. Enforcing Foreign Judgments That Have Not Respected State Immunity

1. The Hague Conference on Private International Law

It was in 1996 that the Hague Conference on Private International Law, with important input from European states and from the EU, decided to ‘include in the agenda of the 19th session the question of (…) recognition and enforcement of foreign judgments in civil and commercial matters’.Footnote 4 This led to the creation of a Special Commission to come up with a first draft for a convention. The Special Commission’s 1999 draft included Article 18(3) that, if adopted, would have provided, as one option, for the possibility of exercising universal jurisdiction in civil matters with respect to conduct constituting genocide, crimes against humanity, war crimes, or other serious crimes against a natural person under international law, respectively with regard to ius cogens violations.Footnote 5 It is worth recalling that the draft provision had also provided that the envisaged broad acceptance of jurisdiction would only apply, at least as far as the two latter categories of violations of international law are concerned (namely serious crimes under international law and ius cogens violations other than genocide, war crimes and crimes against humanity), ‘if the party seeking relief is exposed to a risk of a denial of justice because proceedings in another state are not possible or cannot reasonably be required’.Footnote 6

This draft provision thus foreshadowed the last-resort argument made later by Italy during the ICJ proceedings brought by Germany for alleged violations of Germany’s state immunity.Footnote 7 It ought to be noted, however, that this provision, as Peter Nygh and Fausto Pocar’s underlying explanatory report had made clear,Footnote 8 was only meant to govern jurisdictional issues while state immunity was not meant to be limited by the envisaged treaty. This was confirmed by its draft Article 1(4), which in broad terms had provided that ‘[n]othing in this Convention affects the privileges and immunities of sovereign States or of entities of sovereign States, or of international organizations’.Footnote 9 It also ought to be noted that the International Law Commission (ILC) was, during the very same period, working on a draft convention on the jurisdictional immunities of states,Footnote 10 which, as is well known, later led to the adoption of the UN Convention on the matter.Footnote 11 The ILC’s draft convention similarly did not include any reference to a possible limitation on state immunity in cases of serious violations of international law.Footnote 12 Notwithstanding this development within the ILC, the 2001 draft Hague convention, as submitted to and discussed by The Hague diplomatic conference, had retained, mutatis mutandis, identical language to the same effect as the 1999 draft by the then Special Commission. In other words, it had retained the concept of state immunity even when it comes to instances of genocide, war crimes, and other violations of ius cogens.

What is brought to light by this development is that even a possible acceptance of the exercise of universal jurisdiction in matters such as genocide, crimes against humanity or war crimes, in the envisaged future convention on the recognition and enforcement of foreign judgments, would not have been meant to curtail traditional concepts of state immunity even when it comes to serious violations of international law. What is more, as is evident from the fate of the draft, is that even on those issues no consensus could be reached which led in 2005 to the adoption of a mere convention on choice of court agreements.Footnote 13

2. Brussels Ia Regulation

Turning now to developments within the framework of the EU more specifically, as is well known, the Brussels Regulation was amended in 2015. Commonly referred to as the Brussels Ia Regulation, it built on the Brussels and Lugano Conventions,Footnote 14 as well as earlier versions of the Brussels Regulation itself,Footnote 15 and significantly facilitates the enforcement of judgments on civil and commercial matters rendered in another EU member state by providing for a quasi-automatic system of enforcement of such judgments.Footnote 16 This raises the question of whether under the Brussels Ia Regulation a judgment by a domestic court of one member state denying state immunity when it comes to alleged violations of ius cogens committed by a foreign armed force is enforceable in other EU member states. If that were the case, this would clearly be indicative of an acceptance by the EU of a special regime of a more limited concept of state immunity.

Before entering into details, it should be noted that the preambular paragraph 38 of said Regulation confirms—in the view of its drafters—that it ‘respects fundamental rights and observes the principles recognised in the Charter of Fundamental Rights of the European Union, in particular the right to an effective remedy and to a fair trial guaranteed in Article 47 of the Charter’. After having thus confirmed that the Regulation stands in line with the right to an effective remedy, the Regulation, as amended in 2015, now expressis verbis settles that it ‘shall not extend, in particular, to (…) the liability of the State for acts and omissions in the exercise of State authority (acta iure imperii)’.Footnote 17

The amended version, therefore, now also expressis verbis reiterates what the European Court of Justice (ECJ) had already decided in 2007 under the then applicable (older) version of the Brussels Regulation in the Kalavryta case brought by Ms Lechouritou against Germany, and involving a claim for damages related to a massacre committed by the German army in 1943 against Greek civilians.Footnote 18 The ECJ had then decided that such claims do not amount to civil and commercial claims within the meaning of the Brussels system providing for the intra-Union enforcement of judgments.

However, what is brought out by the interplay between the preamble of the amended Regulation and the exclusion from its scope of acta jure imperii—such as acts of armed forces, in particular when they take place within the framework of armed conflictsFootnote 19—is that the Brussels Regulation, as amended, wanted to ‘safeguard’ traditional rules of state immunity. What is more, the drafters of the amended Regulation were obviously aware of the then recent judgment of the ICJ in the Jurisdictional Immunities (Germany v Italy) case. They were also aware of the previously unsuccessful attempts to use the Brussels Regulation to enforce Greek court decisions in Italy,Footnote 20 which had set aside Germany’s state immunity in cases involving war crimes but which could not be enforced in Greece itself for lack of consent by the Greek Minister of Justice.Footnote 21 Accordingly, the amendment of the Brussels Regulation in 2015, when read in conjunction with the above-mentioned preamble to the Regulation, must be seen as evidence of the conviction of EU member states that the traditional rules of state immunity, including when it comes to ius cogens violations, are indeed compatible with the international and European rule of law.

III. Regional European Customary Law on State Immunity?

International law since the judgment of the ICJ in the Asylum (Colombia v Peru) case recognizes—be it only as a matter of principle—the concept, the notion, and the possibility of regional customary law.Footnote 22 Yet, as the Court stated, the existence of any such rule presupposes that ‘[t]he Party which relies on a custom of this kind must prove (…) that the rule invoked by it is in accordance with a constant and uniform usage practised by the States in question’, and that this statement, the Court confirmed, ‘follow[ed] from Article 38 of the Statute of the Court, which refers to international custom “as evidence of a general practice accepted as law”’.Footnote 23

Accordingly, in the case at hand, in order to argue in favour of a rule of regional customary law limiting state immunity when it comes to ius cogens violations, one would have to show coherent and consistent state practice by European states and thus confirming the existence of such a rule (or the emergence thereof). Yet, even if one were to limit oneself to the practice of EU member states, which in itself would be problematic since EU member states presumably do not even constitute a ‘region’ for purposes of general international law, there are only singular cases where no state immunity has been granted even where the underlying issues related to serious violations of either international humanitarian law or human rights law. Even in the case of Italy, the Italian government and Italian courts continue to take the position that Germany enjoys immunity when it comes to the execution of the underlying judgments,Footnote 24 while the judgment of the ItCCFootnote 25 did not base its decision on international law but rather exclusively on domestic Italian law.Footnote 26

Moreover, the 2012 ICJ Judgment in turn had made frequent reference specifically to decisions of European courts, including judgments by Polish,Footnote 27 Slovenian,Footnote 28 BelgianFootnote 29 and Serbian courts,Footnote 30 and on that basis had upheld Germany’s state immunity even in the face of serious violations of the laws and customs of war.Footnote 31 Hence, at most there is practice by only two European states denying state immunity in cases of ius cogens violations, namely Italy and possibly Greece (notwithstanding the Greek government not granting the necessary permission to enforce a judgment of Greek courts against Germany, which then led to an attempt to have the said judgment enforced in Italy). Even in those instances, this practice is limited to the practice of national courts, rather than that of either the executive or the legislative branch, which in and of itself raises fundamental questions as to the notion and concept of state practice within the meaning of Article 38 of the ICJ Statute.Footnote 32

Furthermore, four European states—Finland, Sweden, Norway, and Italy—also made it clear when ratifying the 2004 UN Convention on State Immunity that in their respective understanding the foreign tort exception to state immunity under the Convention does not apply when it comes to activities of armed forces during an armed conflict, and indeed even beyond as far as ‘activities undertaken by military forces of a State in the exercise of their official duties’ are concerned.Footnote 33 Besides, one might also recall the well-known Article 31 of the European Convention on the matterFootnote 34 which expressis verbis contains the very same idea.Footnote 35 Finally, the regional European human rights institution, namely the European Court of Human Rights (ECtHR), has also time and again upheld a broad concept of state immunity. As a matter of fact, it did so even in the face of ius cogens violations like torture.Footnote 36

Put otherwise, one might be tempted to say that if there is one region in the world where the traditional concept of state immunity has been upheld the most, it is Europe. If one were to take a different position, be it only arguendo, namely that there indeed was a European tendency to restrict state immunity when it comes to violations of international humanitarian law or human rights law, the necessary requirements for the creation of a new and more limited rule of customary international law on the matter within both a short period of time and the parameters of the ICJ’s North Sea Continental Shelf (Germany/Netherlands) case are clearly not fulfilled.Footnote 37 Indeed, this is true not only for lack of a virtually uniform practice but also for lack of participation in such practice by those states most concerned by the matter, which in the case at hand would have to include Germany as being particularly concerned by issues of state immunity relating to war crimes and other similar violations of international law committed during World War II (WWII).

Given this situation, it seems barely imaginable that in the foreseeable future a specific European customary law norm on state immunity could develop. Rather, it seems that the EU and its member states, as well as other member states of the Council of Europe, like Norway, Turkey, or the Russian Federation, continue to rely on a broad concept of state immunity. This is also brought out, inter alia, by the recent démarches of the EU against the so-called US Justice Against Sponsors of Terrorism Act (JASTA),Footnote 38 which, by way of amending the US Foreign Sovereign Immunities Act, significantly narrows the scope of foreign sovereign immunity under domestic US law—and it does so in violation of international law.Footnote 39

As a matter of fact, out of the 14 European states having so far ratified UN Convention on State Immunity,Footnote 40 only Switzerland has formally taken the position that the said treaty is without prejudice to developments in international law regarding pecuniary compensation for human rights violations;Footnote 41 while Italy, when ratifying the Convention, merely referred to the necessity to interpret the treaty in line with human rights law.Footnote 42 This acceptance by the vast majority of ratifying European states of the 2004 UN Convention, which does not contain an ius cogens or some other form of human rights exception, once again confirms the general European perspective on the matter, as outlined above. It is even more telling that six of those ratifying European states have done so after the Jurisdictional Immunities Judgment between Germany and Italy had been renderedFootnote 43—and they did so without entering any reservation or formal declaration as to the ‘conservative’ interpretation of the current status of the rules of state immunity by the ICJ.

IV. Possible Legal Implications of the Jurisprudence of the Italian Constitutional Court for European Military Operations

The jurisprudence of the ItCC might have particular implications for European military operations, namely for military operations under the auspices of the EU, given that EU states might face a denial of their state immunity when their troops allegedly commit violations of international humanitarian law during such operations. It should first be noted, however, that it is highly unlikely that European armed forces and their member states will commit violations of international humanitarian law amounting to ius cogens violations akin to the war crimes that gave rise to the jurisprudence of the Italian courts in the first place. Hence, most probably, the issue of a possible ius cogens exception will hopefully remain a mere academic issue when it comes to the realities of current European military operations.

Secondly, and this is a somewhat more difficult question to answer, it is doubtful whether the result reached by the ICJ in its Jurisdictional Immunities Judgment confirming state immunity for belligerent actsFootnote 44 would also apply to activities of armed forces not amounting to participation in an armed conflict as a belligerent party but rather, for example, to acts forming part of a peacekeeping operation. This would then bring back the issue of the scope and status under customary law of the foreign tort exception. Again, it ought to be noted that several European states, including Italy, have taken the position that the counter-exception to the foreign tort exception should be broadly defined as covering all forms of military activities and even those beyond the scope of armed conflicts.Footnote 45

In any case, any debate about the extent of state immunity when it comes to European military operations would first and foremost, and as a preliminary matter, have to tackle the issue of attribution.Footnote 46 If European military operations, conducted under the auspices of the EU, were to be attributed to either the EU or, in the case of an underlying mandate by the Security Council, to the UNFootnote 47 in line with the somewhat problematic jurisprudence of the ECtHR in the Behrami and Behrami v France and Saramati v France, Germany and Norway cases,Footnote 48 the question of state responsibility would obviously not arise. Yet, as the domestic proceedings in the Netherlands concerning the UN peacekeeping operation in Bosnia and Herzegovina have confirmed, mutatis mutandis, parallel issues to the immunity of international organizations might nevertheless come to light.Footnote 49 It ought to be noted, however, that the Protocol on the Privileges and Immunities of the European Union, annexed to the Treaty of Nice,Footnote 50 does not as such provide for a general immunity of the EU at least when it comes to civil proceedings for damages brought before civil courts of an EU member state.

If one were to assume, however, that acts as part of military operations led by the EU were to be at least also attributable to the troop-contributing member states, as was the position taken by German courts concerning military operations conducted off the coast of Somalia within the framework of the European Union Naval Force (EU NAVFOR),Footnote 51 no specific issues of state immunity would arise. Rather, the respective troop-contributing state would be entitled to enjoy state immunity to the same degree as in any kind of unilateral military operation. It is again interesting to note that Italy, when ratifying the 2004 UN Convention on State Immunity, expressly reiterated that—in its view—the Convention does not set aside ‘special immunity regimes, including the ones concerning the status of armed forces and associated personnel following the armed forces’Footnote 52 and it is submitted that this is completely in line with customary law. Accordingly, given that European armed forces would in most cases and including those like Afghanistan, where they are involved in actual fighting, act within the framework of a status of forces agreement concluded with the relevant territorial state specifically providing for the immunity of the respective European state, the issue would be moot since any such European state involved in a military operation would then continue to be entitled to fully-fledged immunity as a matter of treaty law.

Besides, to the extent that a domestic court of the territorial state with which a status of forces agreement providing for immunity has been concluded would have to decide the matter, setting aside such treaty-based immunity would not only require arguing that there is no state immunity in such cases but would have to argue that the alleged customary rule setting aside state immunity in case of alleged war crimes was in and of itself also of an ius cogens character. Such an argument, while being in line with the general thrust of the judgment of the ItCC,Footnote 53 would, however, necessarily assume another bold step not supported by actual state practice.

In any case, it is worth noting that at least when it comes to European military operations in the strict sense, namely those undertaken under the auspices of the EU rather than operations within the framework of NATO but involving European states, the respective status of forces agreements concluded by the EU provide as a matter of routine for an individual right to seize a claims commission, followed by some form of arbitration. For example, the Agreement between the European Union and the Republic of Uganda on the Status of the European Union-led Mission in Uganda,Footnote 54 regulating the legal status of the European Union Training Mission Somalia (EUTM) in Uganda, while confirming in its Article 5(3) that EUTM Somalia ‘shall enjoy immunity from every form of legal process’ at the same time provides in its Article 15 for the setting up of a claims commission, where claims by individuals can be brought, as well as for the creation of an arbitral tribunal, should the claims process fail to adequately address alleged individual damages. In such a scenario the last resort argument, as submitted by Italy in the ICJ proceedings brought by Germany,Footnote 55 and somewhat also reflected in the judgment of the ItCC here under consideration,Footnote 56 would no longer be of relevance, given the alternative to setting aside state immunity. In most situations with a deployment of troops under the auspices of the EU, the issue underlying Sentenza 238/2014 is thus somewhat academic in nature.

V. Further Perspectives Beyond Sentenza 238/2014

Obviously, the unfortunate approach chosen by the ItCC of disregarding the international legal obligations of Italy to implement a binding judgment of an international court or tribunal is not unique. It suffices to refer to the examples of the 2008 judgment of the US Supreme Court in Medellín v TexasFootnote 57 (setting aside the effects of the ICJ judgment in Avena and Other Mexican Nationals, Mexico v United States of America),Footnote 58 or the more recent decision of the Russian Constitutional Court in the Yukos case.Footnote 59 Just like the German Federal Constitutional Court, which had unfortunately in the past—albeit as a matter of principled approach only—mutatis mutandis chosen the collision course with the ECJFootnote 60 and later the ECtHR,Footnote 61 the course chosen by the ItCC has similarly not (yet) led to a concrete collision with the principal judicial organ of the UN. Such a collision would only occur if concrete steps were now taken to execute judgments for damages against German state property located in Italy and if Germany were to then start renewed proceedings before the ICJ, which could possibly lead to another ICJ judgment most probably reconfirming the 2012 ICJ Judgment. Hopefully such a collision can be avoided.

This leads to the question of whether the redress awarded by domestic (Italian) courts ‘as long as’ neither the German nor the international system grant equivalent protection to the victims of serious violations of international humanitarian law committed during WWII is necessary or at least tolerable. For instance, this raises the issue of whether indeed such individual claims do exist in the first place as a matter of the current international lex lata, which one might say is doubtful. Even if this were the case, such individual claims might have already been satisfied under previous interstate agreements or in the meantime might have been subject to some other form of prescription one way or the other.

While these questions would go beyond the scope of this chapter, one has to ask more broadly whether it truly makes sense at the current stage of international law and currently prevailing political developments to take bold steps like recognizing an individual right to compensation for such violations (and even where such violations have been committed more than 70 years ago) combined with denying immunity to the state concerned. The Pandora’s box argument, while having been repeated time and again,Footnote 62 is obvious: does it really make sense, for example, to have Georgian courts decide cases against the Russian Federation for alleged violations of international humanitarian law during the 2008 armed conflict—and then obviously also vice-versa—with almost ‘automatic’, yet completely contrary, results on the merits? Would this constitute an improvement of the international legal order, and would such a development truly foster the international rule of law?

Rather, the way forward—be it only for future cases—should be to enlarge and strengthen the jurisdiction of international courts and tribunals, either those that provide access to individuals or that have some form of compulsory jurisdiction. The European Convention for the Peaceful Settlement of Disputes certainly forms part of such an attempt, which could not be invoked by Italy as a jurisdictional basis for its counter-claim for reasons ratione temporis.Footnote 63 That is to say: if a similar scenario of violations of international humanitarian law was to arise again today between two or more of the contracting parties of the said Convention, and it is hoped that this will not happen, the underlying interstate case for damages could be brought, and rightly so, before the ICJ. It is submitted that this might be the right way forward.

In the same vein, providing for claims commissions might also be a useful and an appropriate mechanism provided the parties involved are indeed able and willing to follow up on such a process.Footnote 64

This leads to a final question: what lessons ought to be learned when it comes to a possible dialogue between domestic and constitutional courts on the one hand, and international courts on the other? In the author’s understanding, international courts not only constitute a capstone but also a cornerstone of the construction of international law. Once such a cornerstone is removed or damaged—and unfortunately, we currently see many instances, benevolent or not, to that effect throughout the world—the danger arises that the whole edifice if not collapses then at least begins to crack. Hence, every attempt should be made not to question their authority even more so since such international judicial institutions by their very nature have the clear advantage of being by far furthest away from domestic political pressures and sentiments.

In summary, one might say that European states, as well as European (constitutional) courts, should not straightforwardly follow Frank Sinatra’s tempting example, who in his 1969 song ‘My Way’ told us that he had not acted ‘in a shy way’, that he ‘had to say the things he truly felt’ and not ‘the words of one who kneels’, and that ‘the record therefore showed that he had to take the blows’ in order to ‘do it my way’.Footnote 65 Domestic courts, and even more so the highest courts of democratic and rule-based countries, do not only have a responsibility to their own constitutional order but also more broadly to the international legal order. Hence, such courts, but also Europe more generally, should try to avoid deciding matters of state immunity ‘their own way’ because it is not only them that would have to take the blow, but such blows could threaten to undermine international law and the international rule of law at large.