Summary: 1. Introduction. – 2. The Concept of Challenging the Decisions of International Commercial Arbitration. – 3. Procedure for Challenging International Commercial Arbitration Awards. – 4. Grounds for Annulment of an Arbitral Award at the Request of One of the Parties. – 5. Grounds for Annulment of an Arbitral Award at the Initiative of the Court. – 6. Concluding Remarks.