The International Court of Justice (ICJ), the principal judicial organ of the United Nations (UN), directed Russia to immediately suspend all military operations in Ukraine.
Article 36(1) of the Statute of the ICJ provides that the ICJ shall have jurisdiction in all matters relating to the UN Charter or other treaties or conventions in force.
The Statute of the International Court of Justice, under Article 41 empowers the ICJ to indicate provisional measures in any case before it in order to preserve the rights of the parties involved.
When the ICJ indicates such provisional measures, the parties to the dispute and the UN Security Council have to be notified.
In the LaGrand (2001) case between Germany and the U.S., the ICJ made it clear that provisional measures are binding in character and create international legal obligations.
Further, provisional measures may be indicated by the ICJ either on the request of a state party or proprio motu i.e., on its own motion.