Geography
The Legality of Economic Sanctions under International Law
Quick fact
While UN Security Council sanctions are clearly legal under the UN Charter, unilateral sanctions imposed by one state on another often lack a clear basis in international law, making them a gray area that can violate sovereignty and trade rules.
Why this is interesting
When a country sanctions another, is it breaking the law? The answer is surprisingly complex—legality depends on who is acting and why.
Read the full explanation
Understanding The Legality of Economic Sanctions under International Law
Imagine international law as a set of rules that states agree to follow. Economic sanctions are coercive measures—like trade bans or asset freezes—used to change another state's behavior. The key is to ask: under what authority are they imposed? There are two main types: multilateral sanctions authorized by the UN Security Council, and unilateral sanctions by one or a few states. The UN Charter gives the Security Council the power to impose binding sanctions to maintain peace and security, making those clearly legal. Unilateral sanctions, however, are more problematic. They might be legal if they are a lawful countermeasure—a response to a previous violation by the target state—or if they are allowed by a treaty, such as trade restrictions permitted by the WTO. Otherwise, they risk violating the principle of non-intervention, which says states shouldn't interfere in others' internal affairs. So, the legality hinges on the legal basis and the proportionality of the measures.
A deeper explanation
The core mechanism is the interplay between treaty law, customary law, and the principles of sovereignty and non-intervention. The UN Charter (Articles 39–41) is the clearest legal basis: the Security Council determines a threat to peace, and then can impose sanctions that are binding on all members. This is collective security in action. Unilateral sanctions face a higher hurdle. Under customary international law, a state can take 'countermeasures' in response to an internationally wrongful act by another state, but these must be proportional and aim to induce compliance, not punish. Additionally, trade sanctions imposed by one state may violate WTO obligations unless they fall under exceptions like national security. The key boundary condition is that for sanctions to be legal, they must have a recognized legal foundation and not excessively infringe on the target's sovereignty or the rights of its people. When sanctions are imposed without such a basis, they can be challenged in international courts or tribunals, and they may be deemed unlawful. This boundary explains why some sanctions (like UN embargoes) are widely accepted, while others (like long-term unilateral embargoes) are criticized as illegal coercion.