Limits of sanctions in Diplomatic Law and consequences
This section explores the legal, structural, and political constraints that shape the use and efficacy of diplomatic sanctions. While diplomatic law offers specific mechanisms for state response, it imposes tight boundaries to prevent escalation and preserve the fundamental goal of maintaining peaceful international relations.
1. Self-Contained Regime and International Wrongful Acts
As mentioned before, the self-contained regime of the VCDR establishes a legal framework with its own remedies and enforcement mechanisms, excluding the application of broader countermeasures allowed under the law of state responsibility. This structure keeps diplomatic sanctions within the limits of international law, preventing escalation into coercive or punitive actions.
The VCDR was designed "to ensure the efficient performance of the functions of diplomatic missions as representing States" and clearly delineates the scope of permissible responses within its legal framework.
This separation is consistent with the principle of lex specialis under Article 55 of the Articles on Responsibility of States for Internationally Wrongful Acts (ARSIWA)¹, which provides that special regimes govern when they prescribe their own conditions and consequences for wrongful acts.
Therefore article 55 ARSIWA implies that special regimes such as the Vienna Convention on Diplomatic Relations (VCDR) may govern matters related to diplomatic conduct and sanctions. Measures such as declaring a diplomat persona non grata fall within the VCDR and are not regulated by the ARSIWA framework, as they do not constitute internationally wrongful acts.
Bruno Simma and Dirk Pulkowski suggest that diplomatic law, as exemplified by the VCDR, may function as a "self-contained regime" due to its specific rules addressing the consequences of violating its primary norms. However, they argue that "completely closed regimes of secondary rules were neither conceivable nor desirable," implying that even diplomatic law should not entirely preclude general international law responses, such as countermeasures, to remain flexible and effective.²
2. Immunity and Privileges
The principle of immunity is central to diplomatic law. It exists not for the personal benefit of diplomats, but to ensure the uninterrupted function of diplomatic missions.
The VCDR emphasized in its preamble that those privileges are not personal benefits, but safeguards to enable diplomats to perform their duties effectively VCDR.
According to Denza, the Special Rapporteur, Sir Gerald Fitzmaurice (During the debate in the International Law Commission in 1957 on the draft articles prepared by him) this is known as a the “functional necessity” theory which justifies privileges and immunities as being necessary to enable the mission to perform its functions.³
States, as both sending and receiving parties, share a mutual interest in upholding diplomatic and consular law, leading to widespread respect for privileges and immunities. These protections are justified to ensure the effective operation of the globally recognized system for inter-State communication and negotiation. As direct representatives of their home State abroad, diplomats are in vulnerable positions, and international law safeguards them and their families, who risk their lives and well-being for the broader purpose of international diplomacy.
The VCDR support this functional necessity theory, with their preambles clarifying that privileges and immunities aim not to benefit individuals but to facilitate the efficient performance of diplomatic missions representing States and consular posts acting on behalf of their States.
The rationale for diplomatic and consular immunities is identical, but their scope differs as it is tailored to the specific functions performed. Consequently, the distinction in public international law between diplomatic and consular roles influences the level of protection afforded to those carrying out these duties.
Consular functions typically lack the representative or political nature of diplomatic functions, focusing instead on commercial, practical, and administrative tasks. While diplomatic functions primarily involve engaging with the central government of the receiving State, consular functions are carried out through interactions with local entities, such as businesses, police, prison officials, and cultural organizations.
Due to the sensitive nature of their tasks, diplomats require more protection and ensured confidentiality compared to consular officials. However, some bilateral agreements grant consular agents additional rights on a reciprocal basis, extending beyond what is strictly necessary for their official duties.⁴
2.1 Obligations during the Enjoyment of Privileges and Immunities
The VCDR explicitly stipulate that the privileges and immunities granted to diplomatic and consular agents come with corresponding obligations that must be respected while stationed abroad.
The individual obligations of diplomats and consuls can be summarized as follows:
(a) an obligation to respect the laws and regulations of the receiving State;
(b) an obligation to not interfere in the internal affairs of the receiving State;
(c) an obligation to abstain from professional and commercial activities.
Immunities and obligations are not directly reciprocal concepts. The International Law Commission (ILC) rejected the notion that a State is obligated to grant immunities only if an envoy fulfills their duties in the receiving State. In its 1958 Commentary to the Draft Articles on Diplomatic Intercourse and Immunities, the ILC clarified that a diplomatic agent’s failure to meet their obligations does not relieve the receiving State of its responsibility to uphold the agent’s immunity. Furthermore, receiving States are obligated to treat all diplomats and consular officials within their territory in accordance with a commonly accepted standard, both legally and in practice.⁵
2.2 Inviolability of Premises – Article 22 VCDR
In modern international law, inviolability refers to the status granted to premises, persons, or property located within a sovereign State’s territory but exempt from its standard jurisdiction. Under the VCDR, the receiving State is obligated to refrain from exercising sovereign rights, particularly law enforcement powers, over inviolable premises, persons, or property.
The receiving State has a positive obligation to safeguard inviolable premises, persons, or property from physical intrusion, interference with their operations, or any affront to their dignity. The VCDR grants inviolability to various premises, persons, and property, though certain properties, such as the mission’s means of transport and the diplomatic bag, receive specific immunities that are less than full inviolability. Article 22, paragraphs 1 and 3, outline the receiving State’s duty to refrain from exercising authority over mission premises, while paragraph 2 details the positive duty to protect them.⁶
Article 22
1. The premises of the mission shall be inviolable. The agents of the receiving State may not enter them, except with the consent of the head of the mission.
2.The receiving State is under a special duty to take all appropriate steps to protect the premises of the mission against any intrusion or damage and to prevent any disturbance of the peace of the mission or impairment of its dignity.
3.The premises of the mission, their furnishings and other property thereon and the means of transport of the mission shall be immune from search, requisition, attachment or execution.
2.3 Personal Immunity – Article 29 VCDR
According to Denza Article 29 of the Convention, like Article 22, first confers ‘inviolability’ and then defines in greater detail what is meant. As in the case of premises of a diplomatic mission there are two aspects of inviolability—first the duty on the receiving State to abstain from exercising sovereign rights and in particular law enforcement rights, and secondly the positive duty to treat the diplomatic agent with due respect and to protect him from physical interference by others with his person, freedom, or dignity.⁷
Diplomatic sanctions are crafted to comply with the VCDR and respect immunities. For example, when a diplomat is declared persona non grata and expelled, they retain full diplomatic immunity and inviolability until they leave the host country. Article 29 of the VCDR ensures that a diplomatic agent’s person remains inviolable, with this protection persisting for the duration of their presence in the host country following expulsion.⁸
According to Satow: Additionally, this principle is echoed in traditional diplomatic practice, where even in cases of severe diplomatic breakdowns, expelled diplomats are afforded safe passage and protection to ensure compliance with international law. For example, diplomatic manuals and legal commentaries affirm that inviolability extends to the period necessary for departure, emphasizing the priority of protecting the personal safety and dignity of diplomatic personnel.⁹
3. Consequences of Diplomatic Sanctions
According to Tara Maller, diplomatic sanctions, (talking about the United States situation), have different consequences, such as:
· They may impact the United States ability to collect information on the target state and to communicate with the target state. In the Libya case, diplomatic sanctions impacted target compliance with demands related to terrorism (specifically, the Lockerbie-related demands) and the Libyan WMD programs.¹⁰
· They not only impact intelligence collection, communication and public diplomacy efforts, but that these effects may actually undermine the effectiveness of economic sanctions and impact foreign policy outcomes.¹¹
· To the extent that a lack of diplomatic presence in the target state reduces U.S. capacity for information-gathering, the U.S. may be less equipped to identify what particular groups, businesses or leaders to target.¹²
The existence, absence, or scale of embassies or consulates in a foreign nation directly impacts the quantity and quality of information a country receives. Additionally, effective sanctions rely on high-quality intelligence and precise, current, and trustworthy data to produce dependable sanctions lists.¹³
Diplomatic sanctions significantly enhance the acquisition of sensitive information, as severing diplomatic relations restricts states' access to critical data.
Some of the most valuable intelligence pertains not to the economic consequences of sanctions but to the level of pressure the targeted regime perceives due to specific measures. In essence, assessing the regime’s concern about imposed sanctions is crucial.
Moreover, intelligence revealing the psychological impact of sanctions is equally, if not more, important than evaluating their direct economic effects on the ground.¹⁴
¹ International Law Commission, Draft Articles on Responsibility of States for Internationally Wrongful Acts, with Commentaries, Yearbook of the International Law Commission, 2001, vol. II, Part Two, Article 55, https://legal.un.org/ilc/texts/instruments/english/commentaries/9_6_2001.pdf.
² BrunoSimma and Dirk Pulkowski, Self-contained Regimes in International Law, 485.
³ Eileen Denza, Diplomatic Law: Commentary on the Vienna Convention on Diplomatic Relations, 4.ª ed. (Oxford: Oxford University Press, 2016), 11.
⁴ Tom Ruys, Nicolas Angelet, and Luca Ferro, eds., The Cambridge Handbookof Immunities and International Law (Cambridge: Cambridge University Press, 2019), 413.
⁵ Tom Ruys, Nicolas Angelet, and Luca Ferro, eds., The Cambridge Handbook of Immunities and International Law (Cambridge: Cambridge University Press, 2019), 424.
⁶ Eileen Denza, Diplomatic Law: Commentary on the Vienna Convention on Diplomatic Relations, 4.ª ed. (Oxford: Oxford University Press, 2016), 110.
⁷ Eileen Denza, Diplomatic Law: Commentary on the Vienna Convention on Diplomatic Relations, 4.ª ed. (Oxford: Oxford University Press, 2016), 214.
⁸ Eileen Denza, Diplomatic Law: Commentary on the Vienna Convention on Diplomatic Relations, 4.ª ed. (Oxford: Oxford University Press, 2016), 29.
⁹ Ernest Satow, A Guide to Diplomatic Practice, 6th ed., ed. Ivor Roberts (Oxford: Oxford University Press, 2009), 279.
¹⁰ Tara Maller, Diplomacy Derailed: The Consequences of U.S. Diplomatic Disengagement (PhD diss., Massachusetts Institute of Technology, 2011), 266.
¹¹ Tara Maller, Diplomacy Derailed: The Consequences of U.S. Diplomatic Disengagement (PhD diss., Massachusetts Institute of Technology, 2011), 70.
¹² Tara Maller, Diplomacy Derailed: The Consequences of U.S. Diplomatic Disengagement (PhD diss., Massachusetts Institute of Technology, 2011), 72.
¹³ Tara Maller, Diplomacy Derailed: The Consequences of U.S. Diplomatic Disengagement (PhD diss., Massachusetts Institute of Technology, 2011), 72.
¹⁴ Tara Maller, Diplomacy Derailed: The Consequences of U.S. Diplomatic Disengagement (PhD diss., Massachusetts Institute of Technology, 2011), 75.