State responsibility under international law is the body of rules determining when a State is legally responsible for conduct that constitutes an internationally wrongful act and what legal consequences follow from that responsibility. The central framework is contained in the International Law Commission Articles on Responsibility of States for Internationally Wrongful Acts, adopted in 2001 and subsequently commended by the United Nations General Assembly to the attention of Governments.
The basic principle is that an internationally wrongful act of a State entails the international responsibility of that State. The framework is concerned with secondary rules, meaning rules about the consequences of breaching international obligations, rather than with creating the underlying primary obligations themselves. Primary obligations may arise from treaties, customary international law, general principles or other applicable sources, while the law of State responsibility determines when conduct attributable to a State breaches such an obligation and what follows. The ILC Articles are not themselves a multilateral convention in force, but they have been widely relied upon in international practice and by international courts and tribunals.
The basic structure of State responsibility requires two central elements. First, the relevant conduct must be attributable to the State under international law. Second, that conduct must constitute a breach of an international obligation binding upon that State at the relevant time. Attribution does not simply mean that an individual involved in the conduct happens to be a citizen of the State.
Conduct can be attributable because it is performed by a State organ, by an entity exercising elements of governmental authority in specified circumstances, by persons or groups acting under particular forms of State direction or control, or in other circumstances recognised by the rules of attribution. Breach concerns conformity with an international obligation and can arise through an act or an omission.
The ILC framework also makes clear that material damage is not universally required before an internationally wrongful act exists. Whether damage is an element of the underlying wrong depends upon the particular primary obligation. Consequently, State responsibility is not simply a compensation system for physical damage but a broader legal framework concerning compliance with international obligations.
Attribution is technically important because States act through people, institutions and organisations rather than as physical entities. The ILC Articles therefore contain detailed rules identifying circumstances in which conduct is considered conduct of the State. Conduct of State organs is attributable regardless of whether the organ exercises legislative, executive, judicial or other functions and regardless of its position within the constitutional structure.
Certain conduct of entities empowered by domestic law to exercise governmental authority can also be attributable when those entities act in that capacity. Conduct of organs placed at the disposal of another State, conduct of persons or groups acting under the direction or control of a State in specified circumstances, conduct of persons exercising governmental authority where official authorities are absent or unavailable, and conduct of insurrectional movements that subsequently become the government or establish a new State are addressed separately. Conduct initially not attributable can also become attributable where a State acknowledges and adopts it as its own. These rules prevent States from avoiding international responsibility merely by acting through intermediaries or institutions.
The second major element is breach of an international obligation. A State breaches an obligation when its conduct fails to conform with what that obligation requires, whether the conduct consists of an action or an omission. The relevant obligation may require a particular result, prohibit particular conduct, require due diligence or impose another standard, so the law of State responsibility does not establish one universal requirement of fault.
The ILC specifically treats fault as dependent upon the primary rule, meaning that some obligations may require negligence, intent, due diligence or another mental or behavioural standard while others can operate without a general fault requirement. The timing of the obligation is also important. An obligation must bind the State when the relevant conduct occurs, and special rules address continuing breaches and composite acts occurring through a series of actions or omissions. Domestic law generally cannot be used simply to transform conduct that violates an international obligation into internationally lawful conduct. The relevant question is conformity with the applicable international obligation.
International law recognises circumstances that can preclude wrongfulness in specified situations. The ILC Articles identify consent, self defence, lawful countermeasures, force majeure, distress and necessity as circumstances capable of precluding wrongfulness when their demanding conditions are satisfied. These doctrines are not general permissions to disregard international obligations. Each has particular requirements and limitations, and some obligations are subject to especially strict rules.
For example, necessity is exceptional and cannot simply be invoked whenever compliance is inconvenient, while countermeasures are subject to conditions concerning the prior internationally wrongful act, purpose, proportionality and other requirements. Self defence operates within the framework of the applicable international law governing the use of force. These circumstances illustrate an important distinction between a breach occurring and a breach being legally wrongful in the circumstances. They also demonstrate why State responsibility requires analysis of both the primary obligation and the secondary rules governing responsibility.
Once State responsibility is established, international law provides consequences concerning cessation, non repetition and reparation. A State responsible for a continuing internationally wrongful act is required to cease the conduct where the applicable conditions are satisfied and may be required to provide appropriate assurances and guarantees of non repetition. The responsible State also has an obligation to make full reparation for injury caused by the internationally wrongful act. The ILC identifies restitution, compensation and satisfaction as principal forms of reparation.
Restitution seeks to restore the situation that existed before the wrongful act where this is materially possible and not disproportionately burdensome. Compensation addresses financially assessable loss where restitution does not provide full reparation. Satisfaction can address injury that cannot adequately be repaired through restitution or compensation and can include appropriate forms of acknowledgement or other measures. The framework distinguishes reparation from punishment and does not establish a general system of punitive damages against States.
Responsibility also raises questions about who may invoke a breach and how international claims are pursued. An injured State ordinarily has a right to invoke responsibility where its own legal interests are affected, but international law also recognises obligations owed to the international community as a whole in relation to which States other than a directly injured State can, under specified conditions, invoke responsibility.
The ILC Articles address issues including nationality of claims, exhaustion of local remedies where applicable, waiver, acquiescence, multiple responsible States and countermeasures. Countermeasures are not equivalent to punishment or unrestricted retaliation. They are exceptional measures governed by legal conditions and are intended to induce compliance with obligations owed to the State taking them or, in certain circumstances, to support cessation and reparation concerning obligations owed to the international community. International dispute settlement can occur through negotiation, arbitration, judicial proceedings or other procedures depending on the applicable consent and jurisdictional rules.
State responsibility should therefore be distinguished from several related concepts. It is different from domestic governmental liability, which is governed primarily by national law, and from international liability for certain harmful activities that are not themselves prohibited by international law. It is also different from individual criminal responsibility, because international criminal law can impose personal responsibility on individuals rather than treating the State itself as the responsible legal subject.
State responsibility can arise from conduct involving military forces, diplomats, government officials, courts, legislation, administrative authorities or other actors where the international rules of attribution and breach are satisfied. The framework remains important because international law lacks a single world government with general jurisdiction over all States. Responsibility supplies a legal structure for identifying breaches, requiring cessation where appropriate, providing reparation and enabling lawful invocation of international obligations. The ILC Articles remain a central reference point even though their final legal status is that of a set of articles rather than a universally ratified State responsibility convention.
