I. Introduction
The International Criminal Tribunal for the Former Yugoslavia (ICTY) was created ad hoc by a decision of the United Nations Security Council to deal with the unique situation in the former Yugoslavia.Footnote 1 Another ad hoc tribunal, the International Criminal Tribunal for Rwanda (ICTR), was created to deal with a similarly disturbing situation in that country.Footnote 2 Article 9 of the ICTY Statute Footnote 3 and Article 8Footnote 4 of the ICTR Statute prescribe the relationship between the tribunals and national courts. The establishment of the tribunals was based on the principle of concurrent jurisdiction.
However, since both tribunals have a special mission, that of contributing to the restoration and maintenance of peace in the Former Yugoslavia and Rwanda, they needed more than simple concurrent jurisdiction. Hence, the Statutes grant them primacy over the jurisdiction of national courts.Footnote 5 The extraordinary jurisdictional priority granted to the ad hoc tribunals is justified by the ‘compelling international humanitarian interests involved’,Footnote 6 and by the Security Council's determination that both situations constituted a threat to international peace and security.Footnote 7 But invoking such primacy is subject to the satisfaction of one or more of the situations defined under Rule 9 of the Rules of Procedure and Evidence of the ICTY and ICTR.Footnote 8 Accordingly, at any stage of the procedure, the international tribunals may formally request the national courts to defer to their competence in accordance with the terms of the Statutes and their Rules.Footnote 9 This stands in contradistinction to the complementarity regime chosen for the International Criminal Court's Statute (Rome Statute complementarity model), which provides domestic courts with the priority to act, unless a State shows unwillingness or inability to proceed.Footnote 10
Nonetheless, the two regimes established by these different institutions are based on a common ground, namely concurrence with the jurisdiction of national courts. While the mechanism established by the ad hoc tribunals is based on vertical concurrent jurisdiction strengthened with primacy, the International Criminal Court (ICC) is based on the inverse vertical concurrent jurisdiction that provides national courts vis-à-vis the ICC with such primacy to investigate situations, prosecute and try cases— known as complementarity.Footnote 11 Complementarity as embedded in the current ICC Statute also reflects the ‘jurisdictional relationship’ between the ICC and domestic courts.Footnote 12 It organizes the exercise of such ‘jurisdictional relationship’ through a system of admissibility of situations or cases.Footnote 13 Situations or cases that are deemed inadmissible are therefore, the primary responsibility of national courts.Footnote 14 It follows that the Rome Statute system of complementarity is based on the idea of division of labour between national and international jurisdictions.
This article provides a new dimension to the traditional understanding of primacy and complementarity. It argues that the practice of the ad hoc tribunals under the principle of primacy actually reflects a different relationship between domestic and international jurisdictions that is far from being a strict primacy as traditionally recognised. The established link between the two-tier jurisdictions may be better defined as complementary. The tribunals' practice does not seem to establish only a traditional form of complementarity rather than it shaped at least three distinct models of complementarity that may stand alongside the current 1998 Rome Statute model as summarised in the following section.
II. From Primacy to Complementarity
Primacy as traditionally known seeks to entrust the ad hoc tribunal with the upper hand over any case that is under its jurisdiction. As argued above, the Prosecutor of the tribunal may request deferral of a case at any stage of the proceedings. But, practice has proved that in some instances, although the tribunal could have invoked its primacy proper, to solve the conflict of jurisdiction over a specific case, it has sometimes chosen a different practice, namely to defer to the jurisdiction of national courts on the basis of a division of labour. This has been exercised within the framework of the prosecutorial discretionary powers. While such a practice is not strictly primacy, it may create a relationship between national courts and the tribunal that is more close to being complementarity. This complementary relationship stands alongside the existing mechanism of primacy. Although the complementarity scheme established under the umbrella of prosecutorial discretionary powers shares with the Rome Statute complementarity model the idea of division of tasks, the technicalities underlying the application of both systems are different, rendering each of them a distinct model of complementarity.
The existence of a plan for a ‘completion strategy’ and the amendment of Rule 11 bis of the Rules of Procedure and Evidence reflect a new angle in the understanding of primacy and complementarity. Rule 11 bis as it currently stands permits the tribunals to refer back mid- and lower level cases that are already before their jurisdiction to national courts, thereby entrusting them with the primary responsibility to investigate, prosecute and try a referred case. This decision of referral may be revoked by the Referral Bench if the State fails to conduct proper proceedings. While the initial decision to bring the case before the tribunal is clearly one of primacy, the subsequent decision to send back the case to the national authorities providing them with the primary jurisdiction to proceed is more close to a practice of complementarity based on co-operation and the distribution of tasks—similar in idea to the model created under the exercise of prosecutorial discretion—but different in terms of application as well as the philosophical foundations, thus forming a second model of its own. This model seems to be inspired to some extent by an earlier one created by the Nuremberg International Military Tribunal (IMT).
A third model appears in the decision to revoke an order for referral of a case to a State due to its failure to ‘diligently prosecute’ or provide a ‘fair trial’. Similar to the Rome Statute complementarity model, the third model provides national courts as opposed to the tribunals with primary jurisdiction over referred cases. Such primacy of domestic courts is subject to a test of genuine proceedings. Failure this test would still trigger the jurisdiction of the tribunal to take up the proceedings. This model, although different, is the closest to the current Rome Statute complementarity model as it seems to apply the ‘diligent prosecution’ and ‘fair trial’ as criteria that act to restrict the exercise of jurisdiction of the tribunal over a case that has already been referred to a national court. As the philosophical foundations underlying all of these models and the technicalities of their application are different as explored further in this article, complementarity may emerge in different forms creating various overlapping models. Nonetheless, these models are based on one common idea, that is, the distribution of powers between national and international jurisdictions.
III. Primacy vis-à-vis three Complementarity Models
Some scholars argue that the reason for entrusting the ad hoc tribunals with ‘primacy’ was mainly to remedy the apparent lack of will and ability to conduct fair trials before domestic courts,Footnote 15 in a sense resolving ‘conflicts with national jurisdictions that might shelter an offender from genuine prosecution’.Footnote 16 In Tadić, the ICTY Appeals Chamber affirmed this meaning:
[W]hen an international tribunal such as the present one is created, it must be endowed with primacy over national courts. Otherwise, human nature being what it is, there would be a perennial danger of international crimes being characterized as ‘ordinary crimes’…, or proceedings being ‘designed to shield the accused’, or cases not being diligently prosecuted. If not effectively countered by the principle of primacy, any one of those strategies might be used to defeat the very purpose of the creation of an international criminal jurisdiction, to the benefit of the very people whom it has been designed to prosecute (emphasis added).Footnote 17
In practice, ‘primacy’ seemed to have been applied for a different purpose. Neither, in Tadić,Footnote 18Mrkšić Footnote 19 and Re: The Republic of Macedonia Footnote 20 before the ICTY nor in Musema,Footnote 21Bagosora,Footnote 22 or in the Radio Televission Libre des Mille Collins SARL Footnote 23 before the ICTR, the Prosecutors requested deferral on the basis that the proceedings before national courts were ‘sham’. Instead, in all of these cases, the Prosecutor invoked Rule 9(iii) of the Rules of Procedure and Evidence of the ICTY and ICTR, which states that the investigations or criminal proceedings undertaken by the national authorities of the State are ‘closely related and otherwise involve factual or legal questions which may have implications for the Prosecutor's investigations or prosecutions’. But, in Tadić, it was a common understanding that the tribunal, at the time, was anxious for a case to try. As one commentator puts it, at this early stage in the tribunal's activities, the Prosecutor was ‘desperate’ for a case to prosecute ‘were Tadić to have been arrested ten years later, when the tribunal was suffering under a crushing caseload as well as intense pressure from the Security Council to conclude its operations, it is highly unlikely that the Prosecutor would have meddled with German attempts to bring him to justice’.Footnote 24
While in these cases, the ICTY and ICTR Prosecutors exercised absolute primacy, in other cases they refrained from doing so. In these other cases, the Prosecutors acted under the umbrella of their discretionary powers and entrusted national courts with the primary responsibility to act through a decision to defer to their jurisdiction. This practice reflects a sort of concurrence and complementarity that functions along side the existing system of primacy, and resulted in the division of labour on the basis of co-operation between the tribunals and domestic jurisdictions.
Although in Karamira Prosecutor Goldstone deferred to the Rwandese courts only after a squabble with the Government,Footnote 25 certainly nothing would have stopped him from insisting upon a trial before the ICTR on the basis of primacy,Footnote 26 if he still favoured doing so. Indeed, when Colonel Théoneste Bagosora was arrested in Cameroon on 11 March 1996, Prosecutor Goldstone insisted that he stand trial before the ICTR, despite the extradition requests from Rwanda and Belgium.Footnote 27 In the Djajić and Jorgić cases investigated by the German authorities, the ICTY Prosecutor also deferred to the jurisdiction of national courts,Footnote 28 on the basis of mutual agreement and division of responsibilities. Explaining the underlying philosophy, the Prosecutor said:
The Djajic and Jorgic cases were initiated and investigated by the German authorities, who consulted with the Office of the Prosecutor of the International Tribunal. The Prosecutor assessed that it was not appropriate to seek a deferral of these cases, and the decision was made that they continue to be prosecuted by the German authorities. There is on-going co-operation between the Prosecutor and the German authorities on these and other cases.Footnote 29
Thus, the practice of the ad hoc tribunals was not confined to the application of strict primacy rather than occasionally a clear complementarity approach has been followed based on co-operation—extending the nature of jurisdiction underpinning the ad hoc tribunals and reframing a new model of complementarity. Although the complementarity scheme established under this practice shares with the Rome Statute complementarity model the idea of distribution of responsibilities, the two systems are slightly different. The main difference lies in the fact that the Rome Statute complementarity model relies in its application on a system of admissibility that filters the type of situations or cases that can come before the ICC. By contrast, the system created under the practice of the ad hoc tribunals does not embody such a mechanism for the selection of cases. Instead, the system contemplated is part of the prosecutorial policy to use his or her discretionary powers in selecting the sort of cases that warrant trial before the tribunal.
This trend has been reinforced in the tribunals' ‘completion strategies’.Footnote 30 According to Judge Jorda, President of the ICTY at the time, the strategy encompassed two major components, namely to prosecute before the tribunal ‘those presumed responsible for crimes which most seriously violate international public order and to give cases of lesser significance to the national courts.’Footnote 31 The strategies, as referred to in Security Council Resolutions 1503 (2003),Footnote 32 1534 (2004)Footnote 33 target the completion of trial activities at first instance by the end of December 2008 and to finish the appeals by the end of 2010. This process entailed some amendments to the Rules of Procedure and Evidence (Rules).Footnote 34
As to the ICTY, Rule 11 bis has been amended four times since its adoption in 1997.Footnote 35 According to these amendments, Rule 11 bis (A) permits the tribunal to refer a case to the ‘national authorities’ of either the territorial State,Footnote 36 the State where the accused was arrested,Footnote 37 or to a State ‘having jurisdiction and being willing and adequately prepared to accept such a case’.Footnote 38 The tribunal may order the referral acting under its proprio motu powers or at the request of the Prosecutor.Footnote 39
In reaching any such decision to refer a case pursuant to paragraph (A), the Referral Bench, shall also ‘consider the gravity of the crimes’ as well as the ‘level of responsibility of the accused’;Footnote 40 thus, ensuring that only those bearing the greatest responsibility shall stand trial before the tribunal in accordance with paragraphs 4 and 5 of Security Council Resolution 1534.Footnote 41 This decision may be revoked by the Referral Bench, upon the Prosecutor's request, ‘at any time before the accused is found guilty or acquitted by a national court’.Footnote 42 With an apparent technical exception,Footnote 43 the ICTR has a corresponding provision that sets out the exact requirements found in Rule 11 bis of the ICTY Rules.Footnote 44
The absolute primacy of the ad hoc tribunals experienced a noticeable change with the amendment of Rule 11 bis on 10 June 2004. Rule 11 bis as it currently stands represents a reversed approach to the practice of primacy. The tribunals only deal with the most serious cases that involve those who bear the greatest responsibility, while the remaining cases of lesser magnitude are to be sent back to the jurisdiction of national courts to be their primary responsibility, a system that reminds us of the complementary relationship established between the (IMT) and national courts subsequent to World War II.Footnote 45 The IMT was only to try the ‘major war criminals, whose offences have no particular geographical localization’. The remaining would ‘be sent back to the countries in which their abominable deeds were done in order that they may be judged and punished according to the laws of these librated countries and of free governments’.Footnote 46 This creates a clear system of complementarity that relies on effective co-operationFootnote 47 on the basis of distribution of functions and the level of responsibility of the accused.Footnote 48
But there are substantial differences in terms of application as well as the underlying philosophical foundations between the IMT and the ad hoc tribunals. As to the application, in case of the complementarity model created within the ambit of the prosecutorial discretionary powers, complementarity is backed up with primacy. At any stage of the proceedings, even after the Prosecutor's deferral to the jurisdiction of national courts, he or she may still use his or her discretion and invoke primacy to assert jurisdiction over the case in question. Under Rule 11 bis, the idea of complementarity is not the outcome of the prosecutorial discretion to leave cases already before domestic courts to be judged by them. Instead, it emerges from the decision to share the burden with national courts through the referral of some cases that are already before the tribunals' jurisdiction. Complementarity under this model is also backed with primacy to revoke an order of referral in certain situations as discussed below.
By contrast, in the case of the IMT, there was no need to provide the tribunal with powers of this kind since the trials both at the international as well as the national level were conducted under the control of the Allies.Footnote 49 Thus, the system established was no more than a mere division of labour to achieve a common goal that is, prosecuting the enemy powers through a two-level system. There are also differences in the philosophical foundations. In a system predicated on prosecutorial discretion, it is clear that any decision taken either to defer jurisdiction to a national court or to refrain from invoking primacy relates to the interests of justice within its broader meaning. Although this might be the same in case of Rule 11 bis of the Rules of Procedure and Evidence of the ad hoc tribunals, the philosophy underlying the latter is much broader. It should not be forgotten that Rule 11 bis was amended precisely to serve a broader goal, that is, to assist the tribunals to meet their mandates through a plan for a ‘completion strategy’.
On the contrary, in the case of the IMT, the idea of dealing with certain offenders internationally, while dealing with others domestically was apparently for a different reason. Quoting the language used in the Moscow Declaration that ‘[G]ermans who take part in the wholesale shooting of [Polish] officers or in the execution of French, Dutch … will be brought back to the scene of their crimes and judged on the spot by the peoples whom they outraged’, indicates that the choice was rooted in moral and political rather than legal grounds.Footnote 50
Accordingly, the practice of the Prosecutors of the ad hoc tribunals and the IMT establishes two overlapping yet distinct models of complementarity. Although in case of Rule 11 bis there is also a political dimension involved, the fact that the final purpose is different makes the complementarity idea created under Rule 11 bis still distinct from the one reflected under the system of the IMT. Although the various models share the idea of distribution of responsibilities, the Rome Statute complementarity model remains different.
In terms of application, the Rome Statute complementarity model applies the ‘unwilling’ and ‘unable’ tests coupled with detailed criteria that act as a restriction on admissibility, thus ensuring that only a limited number of situations or cases of certain gravity may be tried before the ICC. On the contrary, neither the models established under Rule 11 bis as well as the discretionary powers of the Prosecutors of the ad hoc tribunals nor the one reflected under the system of the IMT require such conditions. Even the underlying philosophy is different. The Rome Statute complementarity model was mainly introduced to preserve States' sovereignty as well as to restrict the Court's action to very well defined exceptional situations.
While Rule 11 bis (F) apparently retains the absolute primacy of the tribunal through a decision to ‘revoke’ the order and request ‘deferral’ of the case, Rule 11 bis (A)(iii) suggests an additional conclusion, namely the emergence of a mechanism that is more than just one of absolute primacy. It is apparent that, once the State which has received the case on the basis that it was ‘being willing and adequately prepared to accept’ such responsibly shows failure to properly proceed with the case, the tribunal may step in to remove the case from the jurisdiction of domestic courts in accordance with Rule 11 bis (F). Although this provision does not mention the phrase ‘failure to proceed’, it is implicit from reading the two Rules together that the Trial Chamber or the Referral Bench would not step in pursuant to Rule 11 bis (F), unless there is clear deficiency in the proceedings conducted before domestic courts. Any different interpretation given to these provisions would render the system intended for the purpose of the completion strategy ‘inoperative’.Footnote 51
The conditions, which permit the tribunal's interference with domestic proceedings in case of failure, are not mentioned in Rule 11 bis (F). Yet, the jurisprudence of the ICTY and ICTR is instructive in relation to this matter. In the Stankovic case, the ICTY Referral Bench stated that ‘Rules 11 bis (D) (iv) and 11 bis (F) serve as remedies against a failure of the relevant State to diligently prosecute a referred case or conduct a fair trial of the accused in a referred case’.Footnote 52 The ICTY Referral Bench upheld this finding in the Norac et al,Footnote 53Mejakic et al,Footnote 54Jankovic,Footnote 55Kovačević,Footnote 56 and Trbić decisions.Footnote 57 When the Jankovic decision was appealed, the Chamber reached the same conclusion, stating that ‘the Referral Bench did not err in its finding that ‘Rules 11bis (D) (iv) and 11bis (F) serve as precautions against a failure to diligently prosecute a referred case or conduct a fair trial’.Footnote 58 Thus, it could be argued that the lack of diligent prosecution Footnote 59 and a fair trial are the main conditions that trigger the tribunal's powers to ‘revoke the order and make a formal request of deferral’. Yet, neither the Rules nor the jurisprudence of the ad hoc tribunals clearly define ‘diligent prosecution’, or spell out the criteria for its satisfaction.Footnote 60
Rule 11bis (A) (iii) and Rule 11 bis (F), in light of the jurisprudence of the tribunals, create a third model of complementarity comparable in principle to the Rome Statute complementarity model. Once the tribunal determines that a case has not been ‘diligently prosecuted’ before domestic courts, it is competent to proceed with the trial of that case. This scenario corresponds to some extent to the system contemplated in the Rome Statute complementarity model whereby if a State manifests unwillingness or inability to proceed with a situation or case, the ICC is empowered to step in and proceed with that situation or case before its jurisdiction.
While the two systems overlap in terms of the general triggering method,Footnote 61 and might share some of the philosophical foundations such as entrusting the primary responsibility for investigation, prosecution, and trial to the State,Footnote 62 drawing the balance between the cases to be tried internationally with the limited resources at hand,Footnote 63 and ensuring that only cases of extreme gravity are being dealt with at the international level, while those of lesser magnitude are the responsibility of domestic courts, both finally maintain two different objectives.
Save for the similarities, complementarity proper as reflected in the 1998 Rome Statute was not introduced for the purpose of a ‘completion strategy’ that aims to send away cases already before the Court. The aim was, inter alia, to encourage States to enact domestic legislations in order to comply with their duty to exercise domestic jurisdiction.Footnote 64 The system of complementarity was also created to ensure that the ICC is only a facility for States to be used when needed,Footnote 65 thus respecting States' sovereign rights.Footnote 66 Thus, the complementarity schemes established by the practice of the ad hoc tribunals might stand as distinct models of their own along side the traditional Rome Statute complementarity model.
IV. Conclusion
For more than a decade, the classical view has been that the ad hoc tribunals are only vested with primacy proper. This is a misconception, as practice has demonstrated that the tribunals occasionally have had to set aside the idea of invoking strict primacy in the face of national courts. Instead, the Prosecutors of these tribunals found it practical to exercise a sort of complementarity in order to create a dialogue of understanding and cooperation that serves the main goal of narrowing, if not closing, the impunity gap.
The completion strategy plan backed by Security Council Resolutions 1503 (2003) and 1534 (2004) has even strengthened this idea, since the core of the practice merely relied on the idea of national courts complementing the tribunals' mandate. National courts will do what the tribunals would not have been able to do by 2008, if the entire case load remained their primary responsibility. Rule 11 bis has been amended in this direction. The experience of the ad hoc tribunals also shows that the notions of primacy and complementarity are not mutually exclusive rather than they may be reconciled to function alongside one another. This is mirrored in Rule 11 bis, which although creates a system of complementarity it does not rule out the tribunals' existing primacy.Footnote 67 A similar conclusion, yet in a different context, was reached by the ICTR Trial Chamber I in the Ntuyahaga decision on the Prosecutor's motion to withdraw the indictment:
[A]lthough it accepts the submissions of the Prosecutor and the Belgian Government inasmuch as the Tribunal does not have exclusive jurisdiction over crimes included in its mandate and that its criminal proceedings are complementary to those of national jurisdictions, it wishes to underscore that, in its opinion, and as submitted by the Defence, the principle of concurrent jurisdiction as provided in paragraph (1) of Article 8 of the Statute, which recognizes the complementary nature of the judicial work performed by the Tribunal and national courts, must be read together with the provisions of paragraph 2 of said Article 8, which confers upon the Tribunal primacy over the national courts of all States.Footnote 68
Early in its activities, the ICTR realized and acknowledged that the system created by Article 8 of its Statute not only embodies an absolute primacy, but also an implied complementarity.
Although different models reflecting the complementary relationship between domestic and international jurisdictions have been invoked during the practice of the ad hoc tribunals, these notions of complementarity are slightly different than the traditional complementarity model reflected in the current ICC Statute. Accordingly, there seems to be various models of complementarity that may stand alongside one another,Footnote 69 which suggests that complementarity is not an absolute principle but rather that it is a notion that is subject to variations depending on the mode of its application.