The disputes relating to prompt release constitute an important part of the case law of the International Tribunal for the Law of the Sea. The frequency of the use of prompt release proceedings may be explained by the fact that illegal fisheries have increased owing to the exhaustion of biological resources. Considering that the exhaustion of renewable resources entails a serious problem, conflicts regarding illegal fisheries and the detention of vessels and crews will increase. This study examines the procedure for prompt release under Article 292 of the UN Convention on the Law of the Sea by focusing on the case law of the Tribunal. In particular, this study addresses the issues concerning substantive and procedural requirements provided in Article 292, locus standi, the relation between proceedings of the Tribunal and of domestic courts, and criteria for evaluating ‘reasonable’ bond.

The jurisdiction of the International Tribunal for the Law of the Sea to hear applications for the prompt release of vessels and crew was recently invoked by the Russian Federation against Australia in the Volga case. In determining whether the bonding arrangements set by Australia were ‘reasonable’ under Article 73(2) of UNCLOS, the Tribunal clarified several issues regarding prompt release applications, and most significantly, held that non-financial conditions and ‘good behaviour bonds’ were not permissible. In rendering its decision, the Tribunal adhered to the ‘guiding criterion’ of balancing the interests of the flag state and coastal state in determining the reasonableness of the bond. It is submitted that this test is inappropriate, and that this decision will create difficulties for coastal states seeking to control illegal fishing.