The EU Court of Justice's decision today came in response to a legal challenge by Russian oil and gas giant Rosneft before a British court.
Rosneft wants to annul a decision by EU leaders in July 2014 to restrict certain financial transactions and sensitive exports imposed after Russia annexed Ukraine's Crimean Peninsula.
The Luxembourg-based ECJ said the "restrictive measures" adopted in response to the crisis in Ukraine against certain Russian undertakings, including Rosneft, are "valid.